What Are Search Engine Spiders?

Search engine spiders are software programs that sift through content on web pages and build lists of words that appear on those pages. This process is called web crawling. The program visits page after page, following each link and recording the content of each page as it goes along like a spider crawling through the pages. This content is then added to the search engine's index.

A Web spider is a computer program that browses the World Wide Web in a methodical, automated manner or in an orderly fashion.Web spiders are mainly used to create a copy of all the visited pages for later processing by a search engine that will index the downloaded pages to provide fast searches.They are called spiders because they crawl over the Web in search of content . Search engines gather data about a website by ‘sending' the spider or bots to ‘read' the site and copy its content. This content is stored in the search engine's database.



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Search engine spiders are software programs which wonders through internet to index the all about website and its content and if some link comes into the way of spiders then it follows that link and indexes as well.That is why internal linking is so important.

Search engine spider is a program that automatically fetches Web pages. Spiders are used to feed pages to search engines. It's called a spider because it crawls over the Web. Another term for these programs is web crawler. It browses the World Wide Web in a methodical, automated manner or in an orderly fashion.
Because most Web pages contain links to other pages, a spider can start almost anywhere. As soon as it sees a link to another page, it goes off and fetches it.

Search engine spiders are programmed software to visit all websites and follow the links on that and indexes them into their database.

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