A web crawler is a computerized robot that browses the Internet in search of data and indexes sites for search engines. Search engines don’t have a mystical knowledge of what web pages are available online. Before delivering the appropriate pages for phrases and keywords, or the terms users use to discover a beneficial page, the algorithms must crawl and index them.

Until all pages on a website have been indexed, they crawl each page individually. Web crawlers assist in gathering data concerning a webpage and the links that are connected to it. They also assist in verifying the HTML code in addition to the links.

A crawler’s primary objective is to develop an index. Crawlers are the foundation of how search engines operate. They initially search the Internet for material before making the findings accessible to consumers.

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What Is a Crawler?