What is Juce Standalone plugin?

Hi guys, what is juce standalone plugin or app ?
How it works ?
How it is different from a regular audio plugin ?

I am planning to make an standalone app for ios from a audio plugin, what things to keep in mind ?

it’s just the plugin wrapped into a little pseudo host. but be careful. it lacks some features, like sidechain input and playhead features

I am using a rotary knob in standalone plugin. While moving the knob, I need to play tick sound, how to achieve it ?

Do I have to write to process block buffer ? or creating a new audio device ? or anything else ?

processBlock is where all audio processing and synthesis happens