High Performance: For people who want to enjoy the game at its best - a colorful explosion of lights and effects that will provide a view like you have never seen before. Requires a medium graphics card.
Medium Performance: This combination allows you to enjoy the game with many graphics effects, but it's not as demanding as having all graphics effects turned on. This layout is recommended if your computer is busy doing something else (e.g. antivirus scanning, as well as uploading videos to YouTube or downloading from another site), if it's not very powerful or if you are playing in a large laggy map. Requires a graphic card.
Low Performance: For those who run the game using a piece of wood, or for those who often experience lags and low FPS. With this combination you run the game at its lowest level of graphics (besides the skybox, but loading the sky pictures barely changes anything in regards to performance of the game), but at least you can play on poor computers or old devices.
Suggested Performance: The server - according to your computer's specifications - chooses what's best for you.