How can I help the player with the line or aiming?

Question

Accepted Answer

You may tell the player about the line of play, distances and the break on a green before the stroke, but with these limits:

Don't set anything down to help with aiming or stance, such as a club or towel on the ground pointing at the target. The penalty applies even if it's removed before the stroke. (Your player also can't do this, or make a mark in sand or dew to help their swing.)
While the stroke is being made, don't stand where the player is aiming, and don't do anything else to help, such as pointing out a spot on the ground.
Once the player starts taking their stance, don't stand on or close to the line behind the ball to help them aim.
You may stand close to the hole to attend the flagstick.

Penalty: two strokes for your player in stroke play (loss of hole in match play).

Source: Rules of Golf (2023), Rule 10.2b(1), (3) and (4).