The second and third are for the estimated remaining battery and signal strength, respectively. Looking at the icons below and from left to right, the first is used to switch between Competition, Balanced, and Low Power modes. It automatically scans for installed games, but you can manually add more. This was made to optimize performance for gaming. That is why it created its own gaming utility called Oppo Game Space. The company also strives to add value and maximize the hardware inside its products, especially important for gaming. Like Xiaomi or Samsung, it comes with a custom skin on top of Android to help it differentiate itself and offer a unique user experience. Oppo is one of the most popular smartphone brands in the world.
