![]() ![]() This ordering of search results by relevance is known as ranking. When someone performs a search, search engines scour their index for highly relevant content and then orders that content in the hopes of solving the searcher's query. Search engines process and store information they find in an index, a huge database of all the content they’ve discovered and deem good enough to serve up to searchers. ![]() By hopping along this path of links, the crawler is able to find new content and add it to their index called Caffeine - a massive database of discovered URLs - to later be retrieved when a searcher is seeking information that the content on that URL is a good match for. Googlebot starts out by fetching a few web pages, and then follows the links on those webpages to find new URLs. ![]() but regardless of the format, content is discovered by links. Content can vary - it could be a webpage, an image, a video, a PDF, etc.
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