The starred messages feature allows you to bookmark specific messages so you can quickly refer back to them later.

Star a message

1. Tap and hold the message you want to star.
2. Tap Star.

Unstar a message

1. Tap and hold the starred message.
2. Tap Unstar.

View the list of messages you've starred

1. Open the individual or group chat that contains the starred messages you want to see.
2. Tap the name of the individual or group chat.
3. Tap Starred Messages.

To see a list of all starred messages, go to WhatsApp Settings > Starred Messages.