These techniques may be utilized alone or in combination. With browsing, the user typically locates a suitable starting site and then follows links that may appear relevant to the subject. Search engines typically work through software referred to as robots. Robots review documents on the web and catalogue all words in a database. Word associations are then made with documents on the web.
Search engines enable the user to search for specific terms in millions of documents.
With these searches, results may differ from day to day.