What is the difference between “hemp” and “marijuana”?

Not much genetically but a whole lot legally. Both “hemp” and “marijuana” are used to describe the same plant, Cannabis sativa, the difference is that cannabis known as “hemp” is traditionally grown for CBD or CBG or fiber, fuel, textiles, etc and “marijuana” is traditionally THC dominant and used for recreation or medicinally.

Think of it all as “cannabis” but one being dominant in a different cannabinoid than the other.