This article goes the common flight modes found on DJI Drones
Normal Mode (N mode): Uses GNSS and sensors to locate itself and stabilize. This is the most common used mode and will be used in all planned missions. Will limit your drone from moving at its top speeds.
Sport Mode (S mode): Uses GNSS for positioning and responses are optimized for speed. Drone will be more responsive to control stick movements and obstacle sensing will be disabled. Will allow your drone to move at its top speeds.
Function Mode (Tripod/Attitude): Based on Normal mode. Flight speed is limited to allow for easier and more gentle control.