To set things up, go to "Grow > Add Growth Tool > Checkbox Plugin". Here's how you set things up:
During the setup you can choose to "Add (the) Subscribe Button". When ...
- ... checked: The Checkbox Plugin will have very own subscribe button. To subscribe, the user first needs to check the checkbox and then click the subscribe button - this will trigger the after action.
- ... not checked: The Checkbox Plugin can be connected to one of your websites existing buttons. For example the "Buy" button during a purchase. Therefore add "window.confirmOptIn();" to the "Buy" button. Now the user only needs to check the checkbox and complete his order adequately.
After setting up the After Action, save and activate the Checkbox Plugin to move on to the implementation: