When someone sends you an SMS or IM, you see their name if they are in your contacts list, and
the name of the app that was used to send it (for example WhatsApp).
Select Read Aloud to have it read to you by your device.
If you selected the message itself, you see the following options:
Reply - select this button to reply using a predefined message such as Sorry, can't talk
now.
(Android only.)
Read Aloud - select this button to stop the message being read aloud.