That’s the basic nature of the game. You do quests, you group with other people, you wander the countryside and figure out the mysteries of the world. You go see interesting, and exotic new people and creatures and, a lot of times, kill them. As you go up in level, raiding becomes more and more important - large groups of people, usually in guilds, getting together to kill the larger, tougher mobs that drop the really good loot.