Missions are a feature that will allow you to win prizes through the different game modes. They consist of four tasks that you must complete to obtain the prizes. You can access them in the "Missions" section on the home screen.
Once you enter, you will receive the different instructions to complete them. As soon as you comply with the first one, 8 hours must pass until the next one is enabled and so on.
Once you complete the tasks, you must enter the "Missions" section to claim your prizes.