If you have more than one audience, click the Current audience drop-down and choose the one you want to work with.
Click the Manage Audience drop-down and choose Add a subscriber.
Type in the subscriber's information and check the This person gave me permission to email them box. Apply any necessary tags. If you have groups set up in your audience, those options will appear here.
When you're done, click Subscribe.
If the email address is already on your audience and you want to update the information you have on file, check the If this person is already on my list, update their profile box.
After the person has been successfully added, we'll display a success message at the top of the page.
You must have a person's permission before you add them to your audience as a subscribed contact.