Share a thumbs up or heart to let your coworkers know how you feel about their messages.
From the web
Hover your mouse over a message and you will see a smiley face appear to the left.
Click it and choose an emoji that fits your mood.
Your reaction will appear under the message so all your coworkers can see it.
If someone else has already reacted to a message, you can also click the icon to add the same reaction, or you will see the smiley face icon under the message now so you can add a different one. Hovering over the existing reactions will let you see who added them, too.
If you accidentally add a reaction and want to remove it, just click it again and it will disappear.
From the mobile app
Tap and hold the message you want to react to, then choose an emoji.
If you react to the wrong message or want to remove it for any reason, just tap the emoji icon again.
If there is an existing reaction, you can tap it to add the same one for yourself, or you can tap the smiley face to choose another one.