To save a message, click Save message just to the right of the text.
To see a list of your saved messages, click your profile picture at the top of the app, then choose Saved. Or just type /saved in the command box at the top of the screen.
Note: As of right now, there's no way to create tasks, to-do lists, or reminders in Teams. Don't worry, though, that's coming soon.
To save a message in a channel, tap More options > Save.
To save a chat message, press and hold, then select Save.
To see your saved messages, tap More > Saved.