A long time ago I used to use the Overture Keyword Selector Tool to review keywords I was running ads for. The Overture Keyword Selector would allow you to type in a keyword or group of keywords to see how many times that keyword(s) or like keywords had been searched in a specific time period. This can be useful not only for ads that you may be running but it can also be useful for content in articles that you write. The more you use keywords that are popular the more traffic you can generate. The Overture Keyword Selector Tool is no longer available so below are two alternatives that provide a similar service.