Understanding it refers to actual wind that helps move something along faster.

Literal Meaning

It originates from sailing and is mostly used in the context of sea travel or other wind-influenced activities.

Nautical Origin

Gives a sense of ease or assistance, as it implies that external forces are aiding progress.

Used to indicate favorable conditions in non-literal contexts, such as business or life.

When used idiomatically, it does not relate to the weather but to circumstances helping one's efforts.