There are different ways to remotely control your presentations through iPad. For instance you can use one of the wireless mirroring apps to display your iPad screen on a projector while playing your presentation on the connected iPad. There are also two other reliable apps that allow you to use your iPad or iPhone as a presentation remote or clicker. These are Prezi (clicker) and keynote Remote.
I- Keynote Remote
Keynote Remote allows you to control your presentations from any iOS-enabled device. You can open your presentation on Mac and use your iOS device to remotely control it. Alternatively, you can link your mobile remote device to another iPhone or iPad.