Buying a VIP subscription, Premium Pass, or ad-free purchase from the in-game shop removes interruptive ads for the duration of your purchase or subscription. During this time, the only ads you will encounter are optional ones, such as those for treasure chest shortcuts and free vehicle upgrades. 

With a VIP subscription you can skip optional ads as well, allowing you to enjoy the game without interruptions. For more information about VIP subscriptions, please visit this FAQ page.