Your social actions can be configured to handle three different types of opt-in scenarios, based on your internal policies and regional rules.
Accessing the Opt In/Out Menu
Open the Social Actions section of your account and click the Edit button on the action that you'd like to edit the opt in/out option for.
Scroll to about the middle of the page until you see the privacy section.
What the Different Options Mean
Implicit Opt In
By completing this action, the user has to agree to opt in for future communications from you. All users who complete the action will be marked opt in.
Explicit Opt In
Users are shown a privacy statement that contains an unchecked box. By taking the action (in the default state) they are marked as opting out. A user must explicitly check the box to be marked as opting in.
Explicit Opt Out
Users are shown a privacy statement that contains a pre-checked box. By taking the action in the default state they are marked as opting in. A user must explicitly uncheck the box to be marked as opting out.
Note: You can change an action’s opt-in type up until the point a first action has been completed. Once someone has completed an action, the opt-in type is locked for that action and cannot be changed in order to keep the opt-in type the same for all future users.