Players can unlock VIP status by spending money on Gems and Bundles in the Shop. Each purchase permanently adds VIP Points to your account, and the more VIP Points you have, the higher your VIP Level will be. Higher VIP Levels come with increasingly large bonuses to rewards, daily login bonuses, and some unique extras - for instance, reaching VIP Level 5 or greater grants the ability to open VIP Chests.
Note that the money-to-VIP Points ratio will vary depending on one's location and currency.
It is possible to check your current VIP Level and progress towards the next by clicking on the VIP button in any area of the Shop.