Users can choose from three types of messages:
Place a message for yourself at some location. This is similar to a location-based personal reminder.
For a friend
Send a message to a friend that is triggered either by your (sender) location or their (recipient) location. In either situation, your friend is the only one that receives the message.
Share a message with one of your friends. The first person to reach the destination will receive the message, and the other person will be notified.