You can add an emoji reaction to respond to any idea, task or a note written on a stickie. Reactions can be used for various purposes: voting, checking off to-do items — and just for fun.
To react with an emoji, choose a sticky note and find an emoji in the menu. Selecting an emoji will place it on the bottom of the stickie. It is possible to add votes to the existing emojis and add several reactions to one sticky note.
Reacting with emojis