What is the difference between a land rover a jeep and rang rover?

what is the difference between a land rover a jeep and a range rover? what kind of cars are they called? they all seems to look the same. what are they usually use for? or all of them post a difference purpose?|||Land Rover and Jeep are car brands. Range rover is a model under Land Rover. The cars they make are are mostly sports utility vehicles (SUVs) with 4 wheel drive. "what are they usually use for?" Trailing. However, many people use them as normal car.