![]() This constant and recursive process is known as indexing, and is necessary for a website to be displayed in the SERP. Once all data has been fetched by the bots, the crawler adds it to a massive online library of all discovered URLs. To help bots do their crawling work in a more efficient way, larger websites usually submit a special XML sitemap to the search engine that acts as a roadmap of the site itself. Hyperlinks are parsed to find internal pages or new sources to crawl when they point to external websites. These small bots can scan all sections and subpages of a website, including content such as video and images. First a spider/ web crawler trawls the web for content that is added to the search engine's index. ![]() ![]() A search engine performs a number of steps to do its job.
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