Use 'stop by' to imply a visit is brief and not for an extended stay.

Short Duration

'Stop by' doesn't always mean entering a place; you could be staying outside.

No Need to Enter

'Stop by' often suggests a casual, unplanned visit rather than something scheduled.

'Stop by' can be used as an informal invitation without requiring a commitment.

It's often used in casual conversation rather than formal communication.

Suggesting someone to 'stop by' requires less commitment than making definite plans.