Opt-in/Opt-out

Internet Marketing Glossary - Definition:

Opt-in/Opt-out

An opt-in policy or permission-based marketing requires potential customers to choose for themselves the services they want to subscribe to and how the information they provide may be used. An example is a checkbox that users can check to receive email newsletters. An opt-out policy is where existing customers receive follow-up emails or updates without having to provide permission.  But they have an option to cancel the email subscription anytime.