The Task Marathon is a challenge that allows you to earn rewards by completing various tasks in the game.
Tap the icon at the bottom of the screen   to view the tasks available for the day. Tasks in the Marathon change daily, and completing all tasks in a single day will win you a big prize!
For each completed task, you will also receive a reward and special tokens . The accumulated tokens fill up the progress bar. As it fills up, you will receive additional prizes. The more tasks you complete, the more tokens you will earn, and thus, the more rewards you will get!

You can tap on the task itself to see detailed information about how to complete it. Each task also has a magnifying glass icon. Tap on it and follow the instructions provided.