The difference between walking with the wind and walking with the wind.

Downwind means that the direction of the wind blows along the nose, and headwind means that the wind blows toward the nose.

Downwind, a common idiom in daily life, refers to a situation that is conducive to the smooth and unimpeded progress and success of things.

Often put together with other words to express good wishes, such as: bon voyage, bon voyage, etc.