What does go-kart mean by waving the flag?

In the competition, waving the flag represents the flag language, and flags of different colors have different meanings.

In the fierce racing competition, all kinds of unexpected things will happen, which may be weather changes or human accidents, leading to some changes in the competition, which is also one of the charms of racing. The flags flying on the track represent these situations and are conveyed to the people on the field through flags of different colors.