On a game-by-game basis, GameSpot Trax enables publishers, advertisers, and retailers to track a game's total awareness/consideration based on page views, all online and print media coverage, buying cycle data, and geographic and demographic information about users who express interest in the game. Essentially, Trax presents video game industry professionals with a veritable smorgasbord of data.

GameSpot Senior Vice President Vince Broady notes that Trax was designed in direct response to advertiser demand for more data.
...
Broady says that Trax data also applies to GameRankings.com and GameFAQs.com, GameSpot's other video game properties. He says that Trax will also soon be available for MP3.com, CNET's informational digital music site.