Search Engines..

Getting information on the World Wide Web is basically with the help of search engines. While searching the web, the results are usually listed and it might be clicked by the users. his ‘click’ (clicking the link) is called as hit. Based upon the number of hits the ‘hit ratio’ increases and the traffic increases whenever the hit ratio increases. The searching content (information) may comprise of web pages, images, information and other types of files.

The operations of the search engines are basically algorithmic or a mixture of algorithmic and human input. It stores information about many web pages which is called indexing. Later it will be retrieved from the html itself and they are called web crawler. This is an automated web browser which follows all the links on the site. The content of each page are analyzed and then determined how it should be indexed. The function of an index is to provide information to be found as quickly as possible.

The user enters the key word in the search bar and in return the search engine examines the relevant and corresponding indices and provides a list of net matching results according to their criteria. Search engines generally support the Boolean operators AND, OR and NOT. Some of the search engines use an advance search feature like proximity search.

There may be millions of web pages that contain information what the users need. Some pages may be relevant, popular or authoritative than the other pages as a result of their traffic ratio. Hence the search engines review and rank the results and bestow the apt result.