With one tap or click, you can give a thumbs up, express confusion, or offer congratulations. It’s a quick way to asynchronously give praise, recognize progress or signal the need for more information without having to construct a comment or distract someone with a chat/tap-on-the-shoulder.

Configurable notifications are sent to the check-in author every time someone reacts. Like comments, the notifications are delayed for a few moments just in case you reacted accidentally. A second tap will remove the reaction.