User blog comment:G0LD3NF1RE/The Elder Scrolls Online QuakeCon Gameplay/@comment-98.65.228.68-20130810182722/@comment-173.26.94.104-20130810195902

DPS is damage per second. Which is important to know for strategy because even though some classes like rouges don't have really powerful attacks they can hit often and sometimes those frequent attacks make their DPS more than a harder hitting but slower class.

Tank is a class like a warrior that has a lot of health and armor (occasionally massively powerful attacks too) that is used to hold the attention of enemies while the other players pick off enemies usually with long range attacks.