The phrase "potential snags" refers to possible problems or obstacles that may arise in a situation or plan. It suggests that there are factors that could cause difficulties or hinder progress. Full definition
The biggest potential snag is finding the right franchise partners; the people who will buy a local branch of your company and run it as their own. (inc.com)
The only potential snag is that he's also an assassin. (collider.com)
Of course, there are a few potential snags in the vision of nanometer - size circuits stamped onto Frisbee - size graphene wafers. (scientificamerican.com)