TypeRacer asks you to type a relatively short snippet of text, which may be a quote from a book, movie, or something else you can purchase on Amazon (the site is designed to make money by getting you to click on Amazon affiliate links). As you're typing, a little car will move across the screen and you can see other drivers/typists racing. New races start pretty regularly so you should only have to wait a few seconds to join a race.
Just remember, if you spend too much time eying the competition, you're going to fall behind and then you'll never make the high scores list.
[via AppScout]
