This plugin exists to make it easy to handle changes to component options (accessed by the “Options” button in the top right corner). Option changes are handled by Joomla and without a change handler, your component does not know they have happened. For some changes, this does not matter. But for others, you need to take some action when an option changes.

To make this easy, install the Option Change Handler plugin and publish it. To make it work for you, add some code to your component install script. It is conveniently done as a method and you can use the supplied model with minimal changes.

Fully documented at https://docs.black-sheep-research.com/optionchanges