All your conversations are in the Messages tab, reachable from the navigation bar at the bottom of the screen.
- Each conversation shows the other person's photo, username and a preview of the last message.
- A coloured dot marks unread messages.
- Tap a conversation to open it and continue the exchange.
The most recent conversations automatically move to the top of the list. If you started chatting about a listing, that listing stays pinned at the top of the conversation so there is no confusion.
Turn on your phone's notifications so you are alerted the moment a new message arrives.