You can have better rewards by performing different actions within the game.

Among them is more money and food after the battles,
get special bonuses and acquire special offers.

Some of the benefits it includes are:
-The hospital will instantly heal your dwellers.
-Battles can be faster.
-By attacking you in PvP mode you will protect 30% of your resources
-All the constructions and upgrades you make will require less time
-You will receive extra resources
-Reduces the time it will take you to build things

Among other benefits.