Is Wordtracker using statistics from popular search engines or do they have their own search engine? Please fill me in on this.
From their documentation: Wordtracker uses search databases that are created by monitoring what people actually type into search engines. * The Wordtracker Database comprises over 300 million searches carried out at MetaCrawler.com and DogPile.com. * The Overture Database comprises searches carried out through the Overture Pay Per Click network (owned by Yahoo!). Each time someone types a search term on one of these search systems, that information is added to the database. For instance, every day MetaCrawler.com and DogPile.com users type the term golf clubs into the search engines a total of around 50 times, and each time someone does so this information is added to the database. So we can look at this information and see that (at the time of writing), the term golf clubs has been typed into these search engines around 3,400 times.