Your community page is the home of all messages sent to your fans, whether followers or subscribers. Once you have created your subscription, you will be able to choose your audience by clicking the top bar of the compose box:
Recipients will be able to read messages you send them on your community page, as well as receiving notifications via email and the Bandcamp App. Subscriber-only messages will display as locked to Followers.
You can preview what your community page looks like to subscribers or followers using the ‘view as’ drop-down on the navigation bar once you have created your subscription.