You can send and receive messages anytime from within the app by pressing the Message icon located at the bottom of your screen.
To send a message, open the Compose tab, select a recipient, enter your message and press Send
To read a message, open the Inbox tab. Tap on the message to view message details.
To reply to a message, open a message, scroll down, enter your message and press Send.
To delete, unarchive a message, open the Archive tab, open the menu and select the appropriate option
To change the way you receive message notifications, open your profile and select the appropriate option in the Receive alerts and notifications list.