In games with multiple units, different units will have different capabilities, leading to the Common Character Classes. These character abilities lend themselves to particular tactics. When working together as a group, these characters tend to fall into certain roles -- some distract the enemy while others attack, some use beneficial abilities to keep their allies alive, some deal as much damage to the enemy as possible, and some use abilities to boost the effectiveness of allies and reduce the effectiveness of enemies. These are the standard RPG combat roles.