What does a spider do? It builds a cob web and it catches an insect. So, in order to catch an insect, a spider is always on the job of making arrangement for an insect to fall to its prey. Similarly, Internet is also a web spider and a huge cob web is built or weaved on Internet, by web crawling.  This means that as spider builds its lists, similarly on the world wide web  a process called web crawling will make the web site very popular by indexing of words on the web pages.

For example Google is a vastly successful as a search engine and key words crawl on the web site for finding the best web sites. Therefore Google is a search engine which helps key words to flow freely for  giving search engine results when keywords are typed within the button of search box.   Web crawling is related to world wide web search engines such as Google.

These software robots will help you to find the information you are searching for on the Internet. A spider begins its travel on the web by listing most popular web site, which are used efficiently on the servers.  All the key words of SEO are indexed and filed in the lists of websites, and the moment you type the search engine optimized keywords in the search engine, keywords begin to display the results on the form of web pages. There are millions of key words which are search engine optimized and these are continuously growing on the world wide web.