It does look like a tick! Look and see if it has legs on it’s sides. You may want to have a vet check this if it is a tick and it’s been on there over 24 hrs it could have passed some dangerous tick disease to your dog. If it’s a skin tag or tumor It should be removed it will only get bigger and could become cancerous. Any skin growth on the face feet and legs should be addressed or checked out as soon as possible!