It is a process of fetching all the web pages linked in a website with the help of site map.

A crawler is a program that visits the Web site and reads their pages and other information to create entries in a search engine index.

Crawler bots and robots are same. This is an application written in a programming language. This application is used to fetch new and existing websites, a web page from the net. All search engines have their own crawlers.

This is an algorithm of google uses for crawl the websites and take the screen shot and that is stored in the database

A crawler is a program that visits websites and read their pages and other information inorder to create the entries for a search engine index

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.

Internet searcher for finding data on WWW, it records every one of the words in a report, adds them to a database, then takes after all hyperlinks and lists and adds that data additionally to the database. Likewise called web spider,spider.

A web crawler,sometimes called a spider is an Internet bot which systematically browses the world wide web,typically for the purpose of web indexing.

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.

A crawler is a program that visits the Web site and reads their pages and other information to create entries in a search engine index.

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A Web crawler, sometimes called a spider, is an Internet bot which systematically browses the World Wide Web, typically for the purpose of Web indexing (web spidering). Web search engines and some other sites use Web crawling or spidering software to update their web content or indices of others sites' web content.

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

Crawler bots and robots are same. This is an application written in a programming language. This application is used to fetch new and existing websites, a web page from the net. All search engines have their own crawlers.

A web crawler (also known as a web spider or web robot) 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.