What is a Web crawler and how does it work?

[pharmasecure]

hi

What is a Web crawler and how does it work?

[WoodsPainting]

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. The major search engines on the Web all have such a program, which is also known as a "spider" or a "bot."

[HeavenlyBorn]

A web crawler is a computer program that is used to search through millions of websites that are available on the internet according to a search query provided by the user. They may use any of the algorithms that can return the list of websites that are relevant with the query like A star, Page rank etc.

[sophiawils59]

A crawler is a computer program that automatically searches documents on the Web. Crawlers are primarily programmed for repetitive actions so that browsing is automated. Search engines use crawlers most frequently to browse the internet and build an index.

[kylojoe]

The job of a web crawler is to read the activity on the website and tell the search engine. Like Google's Google crawler which we also know by the name of robot.txt file. It crawls the pages of your website and indexes your website. Your website will not be indexed in search engines until this crawler crawls your website.

[salman gee]

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. The major search engines on the Web all have such a program, which is also known as a "spider" or a "bot."

[Saravanan28]

A web crawler is a program or automated script which browses the World Wide Web in a methodical, automated manner. This process is called Web crawling or spidering. Many legitimate sites, in particular, search engines, use spidering as a means of providing up-to-date data.

[warrantyau]

What is a Web crawler and how does it work?

[Sojan]

A Web crawler, sometimes called a spider or spiderbot and often shortened to crawler, is an Internet bot that systematically browses the World Wide Web, typically for the purpose of Web indexing.

[WoodsPainting]

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.

[MVMInfotech]

A web crawler is a computer program that is used to search through millions of websites that are available on the internet according to a search query provided by the user. They may use any of the algorithms that can return the list of websites that are relevant with the query like A star, Page rank etc.

The term crawling literally means scanning through any piece of text, be it links to other websites, image captions, descriptions, articles, anything. It's like a spider searching through the web.