In Seth Godin's book Permission Marketing
"Permission marketing is the privilege (not the right) of delivering anticipated, personal and relevant messages to people who actually want to get them."
So when a fan joins your Facebook page or follows you on Twitter, they have certain expectations about how you will communicate with them.
- They expect that you will not post 50 times within 30 minutes.
- They expect you will not spam them with offers for other products.
- They expect you will respect their time and patience.
- They expect you will reciprocate with good information, offers, or ideas.