You can quickly respond to any message on Slack with an emoji reaction. Reactions can be used for any purpose: voting, checking off to-do items, showing excitement — and just for fun.

Adding a reaction to a Slack message

Mouse over a message and select the Add a reaction icon.  . Choose an emoji for your reaction, and it will appear below the message:

You can also react to the most recent message in a channel from the comfort of your keyboard:

• Type +:emoji_name: in the message box and send.
• Use the keyboard shortcut Cmd Shift \ (Mac) or Ctrl Shift \ (Windows) to open the emoji picker for the most recent message.

Reactions you’ve added will show in blue. To remove your reaction, just click or tap the emoji.

When others add emoji reactions to a message, you can click that emoji to add your vote. Mouse over any reaction to see which team members added it: 

Note: Each team member can add up to 10 emoji reactions to any message, with a maximum of 50 unique emoji from all team members.

Recent reactions

When team members add emoji reactions to your messages, Slack will notify you in the Mentions & Reactions pane. Click the icon at top right to view the latest reactions you’ve received.