Quest Events are time-limited events that require completing tasks. Each task gives points for which the player can receive subsequent Rewards. These tasks can be limited or unlimited.
After the Quest Event ends, the player has 24 hours to collect prizes from the milestones. If the Quest Events contains a Ranking, the rewards for your placements are sent automatically to your mailbox. The Quest Event then disappears.
They are a great way to spend time in-between the bigger events Participating in the Quest Events can additionally help the player in the Events.