What is the main work of Search Engine Spiders? Please suggest....

Spider is a visualization of Web Crawler, based on the principle of operation and save information of Web Crawler very similar to the activity of a spider. Starting from a website, Spider will crawl into each corner of the page and then go through each of the links on the page. Highlight links that have visited and link the pages that link to the original page, just like creating a silk thread linking two pages together. From an initial Web site, Spider is able to connect many Web sites into a mesh network like a real spider web.

The main work of Search Engine Spider is to crawl your website, 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 indexes of others sites' web content.

Search Engine Spiders main work is crawl your website. And index your all web pages.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. Web crawlers can copy all the pages they visit for later processing by a search engine which indexes the downloaded pages so the users can search much more efficiently.

Search engine spiders are responsible to read through webpage source and provide information to search engines. They are responsible to provide cache certificates to successful crawled webpages.

A spider 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 "crawler" or a "bot."

Spiders are used to feed pages to search engines. It's known as a spider because it crawls over the Web. Another term for these programs is webcrawler.