Completing Quests

Each Guild Wars campaign has a story running through it, formed by a chain of primary quests and missions.

When you see a primary quest listed in your Quest Log, that means it advances the story, leading you to the next mission (or another primary quest). Some players think of these as "link quests." Completing them can earn you XP (used to advance your character), gold, items, skills, or all of the above.

Secondary quests don't advance the story, but when you complete them, you earn some of the same rewards as primary quests. Some players think of these as "side quests." http://www.guildwars.com/gameplay/combat/missionsquests/