Also some MMORPGs such as Flyff have party levels, meaning players can increase the level of the party by gaining experience through killing monsters. After reaching a certain level the party gains various exp boosts and buffs that effect all of the party members.
Larger parties definitely have their advantages too, because you can have specialised classes to assume various roles. For example Warriors or Paladins usually assume the role of tank, in order to hold monsters at bay, While a Wizard or any other AOE damage class focuses on inflicting as much damage as possible to multiple enemies, A healer class focuses on healing everybody and finally a buffer class would buff everybody, increasing their damage, health and defence.In some Cases parties could have a class that can debuff monsters in order to kill them more quickly and reduce their damage so there's less stress on the tank and the healer.
Of course there are some MMORPGs that don't really offer anything great from parties, all you really get is shared experience. And the reason why this isn't always a great idea is because sometimes you might have someone who is a lot slower at killing monsters, or they might be slacking off. Therefore you could potentially level a lot faster on your own rather than being in a party.



