What is the main purpose of search engine spiders?

[mjhonson]

For Index sites, because even though spiders visit sites, their main function is not only to visit them but to index their contents spiders do not monitor sites for unethical activities.

 

[Thoughtgrid]

Spiders are used to fetch the billions web page all major search engine google,yahoo are used this spider these program work when search the web and travel to one hyper link to another link.

 

[stuartspindlow11]

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.

 

[Victorvictories]

Spiders are mainly used to crawl a website and to index the site in the database of the search engines chiefly for getting quick access. The primary functions of Spiders are to visit each website and to crawl its data.

 

[cheta]

At certain time intervals, google spiders visits each and every link or webpage of websites to carry out updates i.e if a website deserves to be ranked higher or lower based on the number of traffic visitors as well as seo methods done on such sites so far. spiders also search out for any fresh content with related keywords for promotion to top pages of search results.

 

[Manya Johnson]

Search engine optimization main purpose is to get high page rank over search engine result page by the use of on page and off page seo techniques.

 

[Michael Tyler]

Spiders are used to feed pages to search engines. Another term for these programs is webcrawler.

 

[anusers13]

it will easily be index the sites

 

[ritikamehra]

In search engine the work of spiders is to search for any fresh content with relevant keywords for the search results.

 

[sadianisar]

Search engine spiders usually visits and crawls websites/webpages and then indexes and saves them in their database. It measures the website/webpage carefully and checks title, content, links, images, HTML codes etc and then it ranks the website on the basis of these measurements in search engine.

 

[siyaab]

A Web crawler 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. 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.