Offshore drilling is like fishing, but instead of catching fish you're looking for oil and gas under the sea. You start by finding a spot where there might be oil, like a big underwater mountain or hill. Then, you use a special boat called a drilling rig to dig a deep hole in the sea floor - this is called a well. Once the well is dug, you use a special pump to suck out the oil or gas and bring it back to the surface.
Offshore drilling is important because it helps us find and use oil and gas, which are sources of energy that we use to power our homes, cars, and more. But drilling can also be dangerous for the environment and sea creatures that live in the ocean. So, companies that do offshore drilling have to be very careful to make sure they don't accidentally harm anything in the water or on the shore. They have to follow special rules and use special equipment to keep everyone and everything safe.