If a "webmaster wishes to restrict the information on their site available to a Googlebot, or another well-behaved "spider, they can do so with the appropriate directives in a "robots.txt file, or by adding the "meta tag
<meta name="Googlebot" content="nofollow" /> to the web page. Googlebot requests to "Web servers are identifiable by a "user-agent string containing "Googlebot" and a host address containing "googlebot.com".
A problem that webmasters["Like whom?] have often noted with the Googlebot is that it takes up an enormous amount of bandwidth.["citation needed] This can cause websites to exceed their bandwidth limit and be taken down temporarily. This is especially troublesome for "mirror sites which host many gigabytes of data. Google provides ""Webmaster Tools" that allow website owners to throttle the crawl rate.
How often Googlebot will crawl a site depends on the crawl budget. Crawl budget is an estimation of how often a website is updated. A site's crawl budget is determined by how many incoming links it has and how frequently the site is updated.