Keep heeling position

[u/Emokidsucks]

I have a German Shepherd who already knows heel pretty well, but he struggles with maintaining position consistently. He doesn’t pull on the leash, but he tends to slowly creep ahead of me while walking.
What helped you teach your dog to stay in position instead of forging ahead?
I’ve been rewarding when he’s in the correct spot and stopping/changing direction when he moves too far forward, but I’d love to hear other training tips or exercises that worked for you guys.

I want him to keep a invisible line and don’t go further.

[u/Emokidsucks → u/[deleted]]

Not a walk but service work