Using the correct lie is very important.

An upright lie will encourage club toe to strike the ground first causing your club head to open at impact.

If the lie is incorrect then the toe or heel of your club head will strike the ground first causing either an open or closed clubface at impact. This also creates a twisting action at impact that will put strain on your shafts, resulting in long-term damage!

A flat lie will encourage the heel, of the club head, to strike the ground first causing your club head to close at impact.

Using the Correct Lie will help keep your clubface square at impact.