Reactions. Give instant feedback on a message – double tap to send a quick 👍 or tap once (press and hold on iOS) for more options: 🥰 ❤️ 🔥 👏 🎉 🤩 😁 😱 🤯 🤔 😢 🤬 👎 💩 🤮

Reactions are always on in private chats. In groups and channels, admins can choose to enable reactions and pick which emoji are available.

You can change your quick-reaction emoji in Settings > Chat Settings on Android or Settings > Appearance > Stickers and Emoji on iOS.