Hi Jim,
A common issue I find! I would remain vigilant as some poop from other animals such as cats may contain parasites that will affect your dog. I recommend researching into deterrent behaviour training and ensuring your dog is up to date with vaccines, flea tick and dewormer as these preventative medicines will combat some of issues that may arise from ingesting poop.
There are many reasons for eating poop (coprophagy) but one that may be relevant is attention seeking. Do you react and attempt to chase / stop your dog? As they may have associated this as a game.