Klout currently supports posting to Facebook personal profiles and Twitter profiles. Posting to Facebook Pages is not currently supported.
You can select whether to post to Facebook and/or Twitter by tapping the Facebook or Twitter icons at the top of the Create screen to toggle the networks off/on. If you are posting to one of those networks for the first time, the app asks you for permission to post to that network. The app does not ask you for these post permissions until it needs to, and cannot post to your networks without the post permission.
Your Facebook, Facebook Pages, Twitter, Foursquare, Instagram, LinkedIn and Google+ accounts, if connected to Klout, continue to contribute to the Klout Score algorithm.