what is crawlers? how it's work?

A Web crawler, in some cases called a creepy crawly, is an Internet bot that methodicallly peruses the World Wide Web, normally with the end goal of Web ordering (web spidering).

Web indexes and some different locales utilize Web slithering or spidering programming to refresh their web substance or lists of others destinations' web content. Web crawlers can duplicate every one of the pages they visit for later preparing by an internet searcher which lists the downloaded pages so the clients can seek considerably more efficiently.Web crawlers are PC programs that sweep the web, "perusing" all that they find. Web crawlers are otherwise called bugs, bots and programmed indexers. These crawlers examine site pages to perceive what words they contain, and where those words are utilized. The crawler transforms its discoveries into a mammoth list. The record is fundamentally a major rundown of words and the site pages that element them. So when you approach a web crawler for pages about hippos, the web search tool checks its file and gives you a rundown of pages that specify hippos. Web crawlers examine the web consistently so they generally have a breakthrough record of the web
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A web crawler is a bot that goes to different websites and usually collects data from the websites. Typically it is used for indexing. So basically it is a bot that collects data from the web. The data collected can be analyzed and then further action can be taken upon it.

Other names: Web Robot, Web Spider

Who uses it?

The web crawlers are used mainly by web search engines. They are used for indexing. So Google, Yahoo and Bing are good examples of it.
 
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." Crawlers are typically programmed to visit sites that have been submitted by their owners as new or updated. Entire sites or specific pages can be selectively visited and indexed. 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.
 
Crawlers (aka web spiders or web robots) are search engine bots that are finding and collecting new and updated data from the web. This data is later used for page indexing.
 
nikilkumar said:
what is crawlers? how it's work?
Click to expand...

A Search Engine Spider that also known as a "crawler", "Robot," SearchBot " and simply a Bot, is a program that most search engines use to find what's new comes on internet or web, Google's Bot or Crawler keeps in searches of new content what we publish regularly on websites.

When he crawls then our webpages appear in cache of search engines.


i hope you will be getting what you want to know..
thanks.

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A Web crawler, sometimes called a spider, is an Internet bot that systematically browses the World Wide Web, typically for the purpose of Web indexing (web spidering).
 
A Search Engine Spider (also known as a crawler, Robot, SearchBot or simply a Bot) is a program that most search engines use to find what's new on the Internet. Google's web crawler is known as GoogleBot. ... First, the search bot starts by crawling the pages of your site
 
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