Run the automation tool as follows to build your plugin for distribution (RunUAT is a batch file in Engine/Build/BatchFiles):
RunUAT BuildPlugin -Plugin="<full path to your .uplugin>" -TargetPlatforms=Win64+Android+Whatever -Package="<full path to where you want the output>" -Rocket
Then you can delete the source folder from the output and distribute the rest. But, as far as I’m aware there is a longstanding issue that prevents binary-only plugins from working as a project level plugin in packaged builds. So if you want to distribute it to people and your plugin gets linked in to a packaged build (ie. it’s not an editor-only plugin) then you’ll need to tell people to install it to the Engine/Plugins directory, as opposed to their project Plugins directory.