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.

What Is a Crawler?