The town is your personal hub that you’ll gain access to early in the game. It is home to various useful facilities that you can use to enhance and help you with your gameplay. You can even spend Gold or Crystals to permanently upgrade your facilities to improve their capabilities. These upgrades become available as you Rank up and upgrade your town hall.
The main building in your town that’s directly related to unlocking new facilities and upgrading them. Keep upgrading your town hall whenever you have the chance to allow new facilities to be built and increase the level cap of other existing facilities. Upon maxing out the town hall’s level (LV.7), the town hall will just become a decoration with no further function or use.