A Pull shot starts out left and continues directly left* of your intended target.

If you have pulled your shot you are normally moving your upper body quicker than your lower body, causing you to Pull the shot to the left.

Okay with that?  Now this is where it gets sticky...

The flight of a Pulled ball can also slightly turn-in, causing Pull Slice or Pull Fade.

The ball flight starts straight and proceeds to go left of your target, but then...it starts to curve back right in the final stages of flight!

The Pull shot will normally be a much shorter distance than the so desired Pure Shot.

What happens to the ball when it parts company with your club is down to you, and how you manage the set-up of your shot.

*Trajectory is reversed for a left-handed player.