What does "Personal message viewable in:" mean?

On CatholicMatch, free members can read any personalized communication 10 days after receipt. When a message is received, for the next 10 days, it will be covered by a message that states "Personalized message viewable in:", along with a countdown. This countdown lets you know how much time is remaining before you will be able to read the message or you can choose to subscribe to bypass the waiting period.