A public show is a free live stream that is available for anyone to view; in other words, when someone sees your cam room on our main page and clicks on it, they'll be able to see you live. If you want more privacy when engaging with a fan, tell them to take you Private.
You earn money with public shows by having your audience tip you and/or reward you with virtual gifts (aka "action gifts").
However, Cherry.tv models can also offer private, group, and spy show formats as well. If you check out your model profile settings, you can easily set your show rates (and update them instantaneously during a stream), and you can also enable/disable show formats as well.
Remember: you are always in control of setting your rates and what you wish to do when you stream.