The Google Play horizontal lockup is preferred for most marketing materials. We recommend you only use the wordmark without the Google Play prism when dealing with busy or colored backgrounds. We generally do not allow external usage of the prism (icon) by itself－the only exception being usage of the prism as the app icon for the Google Play Store, when displaying it in the context of a home screen UI. View guidelines
The ‘Get it on Google Play’ badge can be used to drive downloads on Google Play, while the ‘Pre-register on Google Play’ badge is used to drive pre-registrations ahead of an app launch. If you’re driving customers to download content on Google Play, please use the badges – not the primary logo lockups.