Luring uses a piece of food to guide your dog into different positions, a bit like a magnet on their nose. Start with small movements, then build up to guiding your puppy through more complicated directions.
Your puppy should follow your hand, not mouth it, bite it, or jump at it.
Once your puppy has followed you for a short time, mark and reward. This teaches them that following the lure earns the reward, a foundation you can build on for teaching all sorts of other behaviours.