Choosing a Search Engine Where to look for the quickest results. All search engines do a keyword search against a database. Most of the major search engines index a large portion of the content of the World Wide Web using different criteria for choosing which sites to crawl and index. Portals Portal is a term that describes a site on the World Wide Web used as the starting point or gateway to the Web.
Most portals also have search tools.
These sites address specific interest groups and contain information relevant to one subject area.