Off-shore oil and gas in the United States means that oil and gas companies build things like wells (holes) and rigs (big metal structures) in the ocean near the U.S. coast. That way, they can extract oil and gas from the ground underneath the sea (which is where all the oil and gas comes from). This can be dangerous, so companies need to make sure that they work carefully, follow safety rules, and protect the environment. The oil and gas they get can then be used to provide energy to homes and businesses.