Each location has Explorer's Tasks, quests you can complete to get various rewards. To view Explorer's Tasks, press the chest icon in the bottom-left corner of the game screen.
In the opened window, you will see the task list and your progress.
You earn special coins for completing the Tasks. Once you have the required number of coins, you receive a reward chest containing various resources. To view all the rewards you can earn in the current location, tap All rewards.
You can also get grand prizes in the first three locations of the first Chapter. To get them, you need to complete all the Explorer's Tasks of a location. The grand prizes are Fennec, Panda, and the Lightning Bolt Accessory.