All golf coaches agree that a shoulder turn in the backswing is very important.

They may not agree on the amount of shoulder turn or the reasons why the shoulder turn is important but they all recognise that it is a key element in all good swings

A few reasons why it is important are: -

It is not possible to move the arms and club back in plane without a shoulder turn.

Turning the shoulders in the backswing allows the shoulders to turn in the downswing and this assists in creating club head speed.