It's a courteous way to ask for help without being direct or demanding.

Polite Request

The phrase can make a request seem less serious and more friendly.

Softening Tone

Asking for a favour can create a sense of camaraderie when both parties are willing.

It can make a reprimand sound less harsh and more manageable.

It's a colloquial way to steer someone towards correct behavior without strict authority.

Can be used to playfully disagree with someone's opinion or suggestion.