Raw honey is honey that has not been pasteurized (exposed to high heat) after its removed from the hive.
Honey is naturally anti-bacterial, so it doesn’t need to be heated for food safety reasons.
Pure honey is honey without additional ingredients.
Cheap syrups like corn syrup are sometimes mixed with honey to increase profits.
Unfortunately most honey is not tested for purity. "Pure honey" is not a term you can confidently trust.