Luring is a training method where you use a treat or toy to guide your dog into a position or movement. The dog follows the lure with their nose, and their body follows their nose. Once the dog is reliably following the lure into the right position, you add a verbal cue and start removing the food from your hand.
Luring is often the first method new owners try, because it gets fast results. Hold a treat above a dog's nose and move it back over their head, and most dogs will sit without any pushing or pulling needed.