How tight should the remote collar strap be on my dogs neck?

The remote collar needs to be snug up just under the jaw bone on your dog's neck. The probes need to make contact with the skin. When I put the collar on my dog's neck I will hold the dog's muzzle up and move the collar back and forth, up and down so I know the probes make contact with the skin.

When collars are too loose, where they just hang low on the dog's neck the collar probes will not always make contact. This will result in the dog not getting stimulation when you want and it can cause skin irritation.