are handy tools that help you find what you want on the Web.
engine uses software (called spiders or robots) to compile a database
of pages found on the publicly accessible Web. When you enter a
search, the search engine scans its own database to match your terms
against terms in the pages of its database.
So, each search
engine searches the part of the Web it has collected--not the whole
Web--and each search engine has a somewhat different database.
engines also use additional information like your location,
browser and computer type, and past searches to show you more
personalized results. While some argue that this yields more useful
information, others worry about users' privacy and the creation of