Keyword Popularity

Definition: the number of occurrences of searches done by Internet users of a given keyword during a period of time. Both WordTracker.com and Overture’s Keyword Selector Tool (http://inventory.overture.com) provide keyword popularity numbers

FirstClickSEO Commentary: This is what determines how difficult it will be to rank well for that particular keyword. The greater the popularity, the more competitive the demand for rankings on that keyword.