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Google Search
""Google 2015 logo.svg
Type of site
"Web search engine
Available in 123 languages
Owner "Google ("Alphabet)
"Revenue "AdWords
Website Google.com (US)
"IPv6 support Yes, by arrangement[1]
"Alexa rank Steady 1 (December 2017)[2]
Commercial Yes
Registration Optional
"Users 4.5+ billion active users
Launched September 15, 1997; 20 years ago (1997-09-15)[3]
Current status Active
Written in "Python, "C, "C++[4]

Google Search, commonly referred to as Google Web Search or simply Google, is a "web search engine developed by "Google. It is the most-used search engine on the "World Wide Web,[5] handling more than three billion searches each day.[6][7] As of February 2016, it is the most used search engine in the US with 64.0% market share.[8]

The order of search results returned by Google is based, in part, on a priority rank system called ""PageRank". Google Search also provides many different options for customized search, using symbols to include, exclude, specify or require certain search behavior, and offers specialized interactive experiences, such as flight status and package tracking, weather forecasts, currency, unit and time conversions, word definitions, and more.

The main purpose of Google Search is to hunt for text in publicly accessible documents offered by web servers, as opposed to other data, such as "images or "data contained in databases. It was originally developed by "Larry Page and "Sergey Brin in 1997.[3] In June 2011 Google introduced ""Google Voice Search" to search for spoken, rather than typed, words.[9] In May 2012 Google introduced a "Knowledge Graph "semantic search feature in the U.S.

Analysis of the frequency of search terms may indicate economic, social and health trends.[10] Data about the frequency of use of search terms on Google can be "openly inquired via "Google Trends and "have been shown to correlate with "flu outbreaks and unemployment levels, and provide the information faster than traditional reporting methods and surveys. As of mid-2016, Google’s search engine has begun to rely on these deep neural networks.[11]

Competitors of Google include "Baidu and "Soso.com in China; "Naver.com and "Daum.net in South Korea; "Yandex in Russia; "Seznam.cz in the Czech Republic; "Yahoo in Japan, "Taiwan and the US, as well as "Bing and "DuckDuckGo.[12] Some smaller search engines offer facilities not available with Google, e.g. not storing any private or tracking information; one such search engine is "Ixquick.

Contents

Search[edit]

PageRank[edit]

Google's rise to success was largely due to a patented "algorithm called "PageRank that helps rank web pages that match a given search string.[13] When Google was a Stanford research project, it was nicknamed "BackRub because the technology checks "backlinks to determine a site's importance. Previous keyword-based methods of ranking search results, used by many search engines that were once more popular than Google, would rank pages by how often the search terms occurred in the page, or how strongly associated the search terms were within each resulting page. The PageRank algorithm instead analyzes human-generated "links assuming that web pages linked from many important pages are themselves likely to be important. The algorithm computes a "recursive score for pages, based on the weighted sum of the PageRanks of the pages linking to them. PageRank is thought to "correlate well with human concepts of importance. In addition to PageRank, Google, over the years, has added many other secret criteria for determining the ranking of pages on result lists, reported to be over 250 different indicators,[14][15] the specifics of which are kept secret to keep spammers at bay and help Google maintain an edge over its competitors globally.

In a potential hint of Google's future direction for their Search algorithm, "Eric Schmidt, Google's then chief executive, said in a 2007 interview with the Financial Times: "The goal is to enable Google users to be able to ask the question such as 'What shall I do tomorrow?' and 'What job shall I take?'".[16] Schmidt reaffirmed this during a 2010 interview with the Wall Street Journal: "I actually think most people don't want Google to answer their questions, they want Google to tell them what they should be doing next."[17]

In 2013 the "European Commission found that Google Search favored Google's own products, instead of offering consumers the best result for their needs.[18] In February 2015 Google announced a major change to its mobile search "algorithm which would favor mobile friendly over other "websites. Nearly 60% of Google's online "search traffic comes from mobile phones. Google says it wants its users to have access to premium quality "websites. Those websites which lack a mobile friendly "interface would be "demoted and it is expected that this update will cause a shake-up of "ranks. Businesses who fail to update their "websites accordingly could see a dip in their regular websites traffic.[19]

Search indexing[edit]

Google "indexes hundreds of "terabytes of information from web pages.[20] For websites that are currently down or otherwise not available, Google provides links to "cached versions of the site, formed by the search engine's latest indexing of that page.[21] Additionally, Google indexes some file types, being able to show users "PDFs, "Word documents, "Excel spreadsheets, "PowerPoint presentations, certain "Flash multimedia content, and plain text files.[22] Users can also activate ""SafeSearch", a filtering technology aimed at preventing explicit and pornographic content from appearing in search results.[23]

In 2012, Google changed its search indexing tools to demote sites that had been accused of piracy.[24]

Non-indexable data[edit]

Despite Google search's immense index, sources generally assume that Google is only indexing less than 5% of the total Internet, with the rest belonging to the "Deep web, inaccessible through its search tools.[20][25][26]

Google optimization[edit]

Because Google is the most popular search engine, many "webmasters have become eager to influence their website's Google rankings. An industry of consultants has arisen to help websites increase their rankings on Google and on other search engines. This field, called "search engine optimization, attempts to discern patterns in search engine listings, and then develop a methodology for improving rankings to draw more searchers to their client's sites. Search engine optimization encompasses both "on page" factors (like body copy, title elements, H1 heading elements and image "alt attribute values) and Off Page Optimization factors (like "anchor text and PageRank). The general idea is to affect Google's relevance algorithm by incorporating the keywords being targeted in various places "on page", in particular the title element and the body copy (note: the higher up in the page, presumably the better its keyword prominence and thus the ranking). Too many occurrences of the keyword, however, cause the page to look suspect to Google's spam checking algorithms. Google has published guidelines for website owners who would like to raise their rankings when using legitimate optimization consultants.[27] It has been hypothesized, and, allegedly, is the opinion of the owner of one business about which there have been numerous complaints, that negative publicity, for example, numerous consumer complaints, may serve as well to elevate page rank on Google Search as favorable comments.[28] The particular problem addressed in "The New York Times article, which involved "DecorMyEyes, was addressed shortly thereafter by an undisclosed fix in the Google algorithm. According to Google, it was not the frequently published consumer complaints about DecorMyEyes which resulted in the high ranking but mentions on news websites of events which affected the firm such as legal actions against it. "Google Search Console helps to check for websites that use duplicate or copyright content.[29]

Universal search[edit]

"Universal search" was launched by Google on May 16, 2007 as an idea that merged the results from different kinds of search types into one. Prior to Universal search, a standard Google search would consist of links only to websites. Universal search, however, incorporates a wide variety of sources, including websites, news, pictures, maps, blogs, videos, and more, all shown on the same search results page.[30][31] "Marissa Mayer, then-vice president of search products and user experience, described the goal of Universal search as "we're attempting to break down the walls that traditionally separated our various search properties and integrate the vast amounts of information available into one simple set of search results.[32]

"Caffeine" search architecture upgrade[edit]

In August 2009, Google invited web developers to test a new search architecture, codenamed "Caffeine", and give their feedback. The new architecture provided no visual differences in the user interface, but added significant speed improvements and a new "under-the-hood" indexing infrastructure. The move was interpreted in some quarters as a response to "Microsoft's recent release of an upgraded version of its own search service, renamed "Bing, as well as the launch of "Wolfram Alpha, a new search engine based on "computational knowledge".[33][34] Google announced completion of "Caffeine" on June 8, 2010, claiming 50% fresher results due to continuous updating of its index.[35]

With "Caffeine", Google moved its back-end indexing system away from "MapReduce and onto "BigTable, the company's distributed database platform.[36][37]

Knowledge Graph[edit]

The Knowledge Graph is a knowledge base used by Google to enhance its search engine's results with information gathered from a variety of sources.[38] This information is presented to users with a box to the right of results.[39] Knowledge Graph boxes were added to Google's search engine in May 2012,[38] starting in the United States, with international expansion by the end of the year.[40] The information covered by the Knowledge Graph grew significantly after launch, tripling its original size within seven months,[41] and being able to answer "roughly one-third" of the 100 billion monthly searches Google processed in May 2016.[42] The information is often used as a spoken answer in "Google Assistant[43] and "Google Home searches.[44] The Knowledge Graph has been criticized for providing answers without source attribution.[42]

"Hummingbird" search algorithm upgrade[edit]

In 2013, Google significantly upgraded its search algorithm with "Hummingbird". Its name was derived from the speed and accuracy of the "hummingbird animal.[45] The change was announced on September 26, 2013, having already been in use for a month.[46] "Hummingbird" places greater emphasis on "natural language queries, considering context and meaning over individual keywords.[45] It also looks deeper at content on individual pages of a website, with improved ability to lead users directly to the most appropriate page rather than just a website's homepage.[47] The upgrade marked the most significant change to Google search in years, with more "human" search interactions[48] and a much heavier focus on conversation and meaning.[45] Thus, web developers and writers were encouraged to "optimize their sites with natural writing rather than forced keywords, and make effective use of technical web development for on-site navigation.[49]

Dedicated mobile search results[edit]

In October 2016, Gary Illyes, a webmaster trends analyst with Google, announced that the search engine would be making a separate, primary web index dedicated for mobile devices, with a secondary, less up-to-date index for desktop use. The change was a response to the continued growth in mobile usage, and a push for web developers to adopt a mobile-friendly version of their websites. Illyes stated the change would happen in "months".[50][51]

Functionality[edit]

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A definition link is provided for many search terms.

Google search consists of a series of localized websites. The largest of those, the google.com site, is the top most-visited website in the world.[52] Some of its features include a definition link for most searches including dictionary words, the number of results you got on your search, links to other searches (e.g. for words that Google believes to be misspelled, it provides a link to the search results using its proposed spelling), and many more.

Search syntax[edit]

Google search accepts queries as normal text, as well as individual keywords.[53] It automatically corrects misspelled words, and yields the same results regardless of capitalization.[53] For more customized results, one can use a wide variety of operators, including, but not limited to:[54][55]

Query expansion[edit]

Google applies "query expansion to submitted search queries, using techniques to deliver results that it considers "smarter" than the query users actually submitted. This technique involves several steps, including:[56]

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Google displaying search suggestions starting with "google sea"

In 2008, Google started to give users "autocompleted "search suggestions in a list below the search bar while typing.[57]

"I'm Feeling Lucky"[edit]

Google's homepage includes a button labeled "I'm Feeling Lucky". This feature originally allowed users to type in their search query, click the button and be taken directly to the first result, bypassing the search results page. With the 2010 announcement of Google Instant, an automatic feature that immediately displays relevant results as users are typing in their query, the "I'm Feeling Lucky" button disappears, requiring that users opt-out of Instant results through search settings in order to keep using the "I'm Feeling Lucky" functionality.[58] In 2012, "I'm Feeling Lucky" was changed to serve as an advertisement for Google services; users hover their computer mouse over the button, it spins and shows an emotion ("I'm Feeling Puzzled" or "I'm Feeling Trendy", for instance), and, when clicked, takes users to a Google service related to that emotion.[59]

Tom Chavez of "Rapt", a firm helping to determine a website's advertising worth, estimated in 2007 that Google lost $110 million in revenue per year due to use of the button, which bypasses the advertisements found on the search results page.[60]

Rich snippets[edit]

In May 2009, Google announced that they would be parsing website "microformats in order to populate search result pages with "Rich snippets". Such snippets include additional details about results, such as displaying reviews for restaurants and social media accounts for individuals.[61]

In May 2016, Google expanded on the "Rich snippets" format to offer "Rich cards", which, similarly to snippets, display more information about results, but shows them at the top of the mobile website in a swipeable carousel-like format.[62] Originally limited to movie and recipe websites in the United States only, the feature expanded to all countries globally in 2017.[63]

Special interactive features[edit]

Besides the main text-based search-engine features of Google search, it also offers multiple quick, interactive experiences. These include, but are not limited to:[64][65][66]

Google Doodles[edit]

On certain occasions, the "logo on Google's webpage will change to a special version, known as a "Google Doodle". This is a picture, drawing, or animation that includes the logo. It is usually done for a special event or day although not all of them are well known.[67] Clicking on the Doodle links to a string of Google search results about the topic. The first was a reference to the "Burning Man Festival in 1998,[68][69] and others have been produced for the birthdays of notable people like "Albert Einstein, historical events like the interlocking "Lego block's 50th anniversary and holidays like "Valentine's Day.[70] Some Google Doodles have interactivity beyond a simple search, such as the famous "Google Pacman" version that appeared on May 21, 2010.

"OK Google" conversational search[edit]

During Google's "developer conference in May 2013, the company announced that, on "Google Chrome and "Chrome OS, users would be able to say "OK Google", with the browser initiating an audio-based search, with no button presses required. After having the answer presented, users can follow up with additional, contextual questions; an example include initially asking "OK Google, will it be sunny in Santa Cruz this weekend?", hearing a spoken answer, and reply with "how far is it from here?"[71][72] An update to the Chrome browser with voice-search functionality rolled out a week later, though it required a button press on a microphone icon rather than "OK Google" voice activation.[73] Google released a browser extension for the Chrome browser, named with a ""beta" tag for unfinished development, shortly thereafter.[74] In May 2014, the company officially added "OK Google" into the browser itself,[75] though the company removed it in October 2015, citing low usage, though the microphone icon for activation remained available.[76]

Personal tab[edit]

In May 2017, Google enabled a new "Personal" tab in Google Search, letting users search for content in their Google accounts' various services, including email messages from "Gmail and photos from "Google Photos.[77][78]

Google for Jobs[edit]

In June 2017, Google expanded its search results to cover available job listings. The data is aggregated from various major job boards and collected by analyzing company homepages. Initially only available in English, the feature aims to simplify finding jobs suitable for each user.[79][80][81]

Discontinued features[edit]

Until 2013, Google Search had a "cross-language search feature called "Translated Foreign Pages."[82] Google's discussion search feature was also discontinued in July 2014.[83]

Criticism[edit]

January 2009 malware bug[edit]

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A screenshot of the error of January 31, 2009.

Google flags search results with the message "This site may harm your computer" if the site is known to install malicious software in the background or otherwise surreptitiously. Google does this to protect users against visiting sites that could harm their computers. For approximately 40 minutes on January 31, 2009, all search results were mistakenly classified as "malware and could therefore not be clicked; instead a warning message was displayed and the user was required to enter the requested URL manually. The bug was caused by human error.[84][85][86][87] The "URL of "/" (which expands to all URLs) was mistakenly added to the malware patterns file.[85][86]

Privacy[edit]

Searches made by search engines, including Google, leave traces. This raises concerns about privacy. In principle, if details of a user's searches are found, those with access to the information—principally state agencies responsible for law enforcement and similar matters—can make deductions about the user's activities. This has been used for the detection and prosecution of lawbreakers; for example a murderer was found and convicted after searching for terms such as "tips with killing with a baseball bat".[88]

A search may leave traces both on a computer used to make the search, and in records kept by the search provider. When using a search engine through a browser program on a computer, search terms and other information may be stored on the computer by default, unless the browser is set not to do this, or they are erased. Saved terms may be discovered on forensic analysis of the computer. An "Internet Service Provider (ISP) or search engine provider (e.g., Google) may store records which relate search terms to an "IP address and a time.[89] Whether such logs are kept, and access to them by law enforcement agencies, is subject to legislation in different jurisdictions and working practices; the law may mandate, prohibit, or say nothing about logging of various types of information. Some search engines, located in jurisdictions where it is not illegal, make a feature of not storing user search information.[90]

Google has been criticized for placing long-term "cookies on users' machines to store these preferences, a tactic which also enables them to track a user's search terms and retain the data for more than a year.[91]

Encrypted search[edit]

Various search engines provide encrypted Web search facilities. In May 2010 Google rolled out SSL-encrypted web search.[92] The encrypted search can be accessed at encrypted.google.com[93] However, the web search is encrypted via Transport Layer Security ("TLS) by default today, thus every search request should be automatically encrypted if TLS is supported by the web browser.[94]

FTC fines[edit]

In 2012 the US "Federal Trade Commission fined Google "US$22.5 million for violating their agreement not to violate the privacy of users of the Apple "Safari (web browser).[95] The FTC was also continuing to investigate if Google's favoring of their own services in their search results violated antitrust regulations.[96]

Instant search[edit]

Google Instant was a feature that "displayed suggested results while the user typed.[97] It was introduced in the US on September 8, 2010. In concert with the Google Instant launch, Google disabled the ability of users to choose to see more than 10 search results per page. At the time of the announcement, Google expected Instant to save users 2 to 5 seconds in every search, collectively about 11 million seconds per hour.[98] "Search engine marketing experts speculated that Google Instant would have a great impact on local and "paid search.[99] Google Search is a turn from a static HTML page into an "AJAX application.[100]

Instant Search could be disabled via Google's "preferences" menu, but "autocomplete-style search suggestions could not be disabled, by intention.[101]

The publication "2600: The Hacker Quarterly compiled a list of words that Google Instant did not show.[102][103][104] Most banned terms are those "considered rude, but some apparently irrelevant searches including "Myleak" are removed.[104]

In September 2012 several sources reported that Google had removed "bisexual from the list of blacklisted terms for Instant Search.[105] As of August 2013 the word bisexual still did not autocomplete, and LGBT activists renewed efforts to have it whitelisted. As of June 2014 "bisexuality" (but not "bisexual") and "myleak" were found.

Redesign[edit]

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Product Sans, Google's typeface since 2015

In late June 2011, Google introduced a new look to the Google home page in order to boost the use of the Google+ social tools.[106]

One of the major changes was replacing the classic navigation bar with a black one. Google's digital creative director Chris Wiggins explains: "We're working on a project to bring you a new and improved Google experience, and over the next few months, you'll continue to see more updates to our look and feel."[107] The new navigation bar has been negatively received by a vocal minority.[108]

In November 2013, Google started testing yellow labels for advertisements displayed in search results, to improve user experience. The new labels, highlighted in yellow color, and aligned to the left of each sponsored link help users clearly differentiate between organic and sponsored results.[109]

On December 15, 2016, Google rolled out a new desktop search interface that mimics their modular mobile user interface. The mobile design consists of a tabular design that highlights search features in boxes. and works by imitating the desktop Knowledge Graph real estate, which appears in the right-hand rail of the search engine result page, these featured elements frequently feature Twitter carousels, People Also Search For, and Top Stories (vertical and horizontal design) modules. The Local Pack and Answer Box were two of the original features of the Google SERP that were primarily showcased in this manner, but this new layout creates a previously unseen level of design consistency for Google results.[110]

Smartphone app[edit]

A Google Search mobile app is available for "Android, "Windows Phone and "iOS devices. In addition to allowing users to perform web searches, the app implements "Google Now, Google's "voice recognition and "intelligent personal assistant software. Google Now uses a "natural language user interface to answer questions, make recommendations, and perform actions by delegating requests to a set of "web services. Along with answering user-initiated queries, Google Now passively delivers information to the user that it predicts they will want, based on their search habits.[111] Google Search for Android was originally introduced in 2007, the same year the Android operating system was introduced. On January 11, 2012, Google introduced an update where they included an updated and simplified user interface, along with other improvements.[112] As of May 2016, around 20% of Google searches on Android used voice recognition.[113]

International[edit]

Google is available in many languages and has been localized completely or partly for many countries.[114]

The interface has also been made available in some languages for humorous purpose:

In addition to the main URL Google.com, Google Inc. owns 160 domain names for each of the countries/regions in which it has been localized.[114]

On September 29, 2015, an Ex-Googler Sanmay Ved managed to buy the domain Google.com from Google via Google Domains, and gain full webmaster control.[115] Google later acknowledged the purchase,[116] and rewarded Ved who in turn requested that the reward be donated to charity. As a result, Google doubled the reward.

Search products[edit]

In addition to its tool for searching "webpages, Google also provides services for searching "images, "Usenet "newsgroups, news websites, "videos, searching by locality, maps, and items for sale online. In 2012, Google has indexed over 30 trillion web pages, and received 100 billion queries per month.[117] It also "caches much of the content that it "indexes. Google operates other tools and services including "Google News, "Google Shopping, "Google Maps, "Google Custom Search, "Google Earth, "Google Docs, "Picasa, "Panoramio, YouTube, "Google Translate, "Google Blog Search and "Google Desktop Search.

There are also products available from Google that are not directly search-related. "Gmail, for example, is a "webmail application, but still includes search features; "Google Browser Sync does not offer any search facilities, although it aims to organize your browsing time.

Also Google starts many new beta products, like Google Social Search or "Google Image Swirl.

Energy consumption[edit]

Google claims that a search query requires altogether about 1 "kJ or 0.0003 "kW·h,[118] which is enough to raise the temperature of one liter of water by 0.24 °C.

Possible misuse of search results[edit]

In 2007, a group of researchers observed a tendency for users to rely on Google Search exclusively for finding information, writing that "With the Google interface the user gets the impression that the search results imply a kind of totality. [...] In fact, one only sees a small part of what one could see if one also integrates other research tools."[119]

In 2011, Google Search query results have been shown to be tailored to users by Internet activist "Eli Pariser, effectively isolating users in what he defined as a "filter bubble. Pariser holds algorithms used in search engines such as Google Search responsible for catering "a personal ecosystem of information".[120] Although contrasting views have mitigated the potential threat of "informational dystopia" and questioned the scientific nature of Pariser claims,[121] filter bubbles have been mentioned to account for the surprising results of the "U.S. presidential election in 2016 alongside "fake news and "echo chambers, suggesting that "Facebook and Google have designed personalized online realities in which « we only see and hear what we like » .[122]

Predicting behavior[edit]

At the "2016 New Hampshire primary, the top-searched Democratic candidate was "Bernie Sanders with 72% of the searches and won with 60% of the vote, according to real-time results of Google's trending search queries, and "Hillary Clinton received 28% of the queries and 38% of the vote. The top-searched Republican candidate was "Donald Trump, who received 41% of the searches an hour before the polls closed and won with 35% of the vote and "John Kasich got 16% of both the vote and the searches.[123]

See also[edit]

References[edit]

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Further reading[edit]

External links[edit]

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