According to data collected by Pocketgamer.biz, there are more than 1000 apps submitted to App Store by developers every day. With this competition rate, when you release an app, it's not easy to get recognition for your app and earn installs. If you have ever tried to market an app yourself, you have probably realized the actual task is not as easy as the theory. Among all methods, app store optimization has been proven to be very efficient because it usually brings GREAT results for developers. To succeed at optimizing app, the most important step is to choose your app store optimization keywords.