Support
From TF2 Wiki
Support classes are the backbone of any team. They give the offensive and defensive classes an extra edge in battle, which can turn the tide of the game in a second. Whether crippling the enemy advance from behind or keeping teammates healed, the support classes are always handy to have around. Medics have the power to heal teammates and overheal them to 150% of their maximum health. Snipers can take out threats from a distance and use Jarate to extinguish fires and increase the damage dealt by their teammates. Spies can infiltrate enemy lines, disable buildings and assassinate critical threats.
