Hello ronnie. Focus is available to everyone no matter their level. This is the ability to tap your Squads in the bottom left (during battle) and direct them to where you'd like them to go. You can send them to specific spots, or give them a target to attack.
As you upgrade Focus in the Training Camp, your Squads will listen to you longer and the cooldown time will be shortened, allowing you to direct your Squads quicker.