SEO How Search Engine Spiders Work

A search engine spider is​ actually just a​ server based software application that is​ designed to​ compile and maintain search engine databases. They are also known as​ robots. These applications were nicknamed spiders because they craw the​ “web” looking for information to​ add to​ the​ search engine’s database.

In theory a​ search engine spider does it​ s job by following networks of​ links to​ find and then grab information from your web site pages. Each search engine (such as​ Google,​ Excite,​ Alta Vista,​ Lycos etc.) has its own criteria for how it​ spiders information. This criterion is​ put together into a​ specific algorithm that helps the​ search engine determine where your site fits in​ its ranking system. the​ problem of​ second guessing search engine spiders is​ that they are always changing the​ requirements of​ this algorithm so web masters are always second guessing how to​ get their URLs listed in​ the​ top web site positions. Also the​ different search engines have different criteria for how they rank information and might have to​ do with their database’s needs. One search engine may rank your site in​ terms of​ its content and yet another may be more interested in​ the​ number of​ links you​ have and yet another may be interested in​ how many hits you​ are getting.

In theory a​ search engine spider could do any one of​ several things when it​ visits your web page. Some spiders simply confirm the​ existence of​ the​ page without indexing it. Some spiders index the​ page content. Yet others will identify all of​ the​ hyperlinks you​ have on​ a​ page to​ other web resources and also other pages on​ your site. a​ spider may visit your pages once or​ it​ may visit it​ several times.

One of​ the​ latest trends is​ to​ keep your index pages lively by adding up to​ 50 to​ 70 new bytes of​ information regularly. This is​ because the​ Alta Vista pages love fresh content. This is​ what makes SEO techniques so interesting to​ follow. the​ rules change along with the​ changing needs of​ the​ spiders.

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