How does a crawler work?

[HeavenlyBorn]

How does a crawler work?

[sinelogixtech]

Hi Friends,
A crawler is a program that visits Web sites and reads their pages and other information in order to create entries for a search engine index. Crawlers apparently gained the name because they crawl through a site a page at a time, following the links to other pages on the site until all pages have been read.

[RH-Calvin]

A search engine crawler reads through webpage sources and provide information to search engines for indexing the webpages.

[Akshay_M]

A web crawler works by discovering URLs and reviewing and categorizing web pages. Along the way, they find hyperlinks to other webpages and add them to the list of pages to crawl next. Web crawlers are smart and can determine the importance of each web page.