The Auto Move option is offered from the very start of the game, and it's incredibly beneficial in case you tend to get lost in the maps (like I do). This Auto Move option will imitate the common Auto Battle option in every other game, and it can be found in helpful or be your worst enemy. Find out when to use this appropriately, and when to prevent it:

When you tap on a mission to auto path you to the area,-- use it.
When you can't play yourself and are combating garbage monsters,-- use it.
Do not use it when battling bosses, due to the fact that you might pass away.

Another option-- optional-- would be to use it when you are heading to the next mission, and you see a Treasure Chest. You can manually walk to the chest, open it, declare the rewards and after that its set path can be resumed.