Before you start to generate Parse APP_KEY and CLIENT_KEY did you know what is Parse? Ok take a overview of Parse than we will start.
Parse.com provides a backend service to developers. If your mobile or desktop app requires a backend on the internet, then Parse is one of the options you can choose.
ok now start generating Parse KEY. Step1: SignUp in to Parse.com, here is a link for signup into parse https://www.parse.com/#signup.
If you can not find your application and client key than go to “Dashboard” and click on “Select an App”