That lets wow gold people know how far you are.
Select your quests based on party size. If you can do the quest by yourself, don't waste time doing it in a party. Instead, spend time doing quests that you can't do without a party. You also might want to avoid quests that require each person in the party to collect a lot of parts. For example if the party has 5 members and you need 20 items for each person, that ends up being 100 items you need to collect! You can complete that much faster by yourself or with a smaller group. Some quest items that are not marked as "Quest Items" can be traded with other members in the party. If you get extra, pass them around. If you're doing quests that require you to each collect "X" number of items, report to the party your status as you go. A good way to do it is to say "4/20". That means you have 4 out of 20 items. That lets wow gold people know how far you are and how far you have to go.