Resumen
This article discusses improvement that can enhance web searching with user preferences. When searching the web, a user can be overwhelmed by thousands of results retrieved by a search engine, few of which are valuable. The problem for search engines is not only to find relevant results, but results consistent with user's information need. It is a user's information need that determines which documents are valuable. Typical search engines limit the user to entering only a keyword query, even though users consider more than the topic when making relevance judgments. Internet is a very large collection of heterogeneous documents, however, web pages are unlike typical documents in traditional databases. Pages can be active, can be automatically generated in real time, and may contain multimedia. Web search engines crawl the web, downloading and indexing pages in order to allow full-text searching. A metasearch engine typically provides a single interface to multiple search engines and combines the results into a single unified list. The ordering of the list is usually determined by the short summaries or scores returned by search engines, or both.