Newton's 1st Law of Motion states that a body will remain in motion or remain at rest unless it is acted on by an out side force. This law is also known as the law of inertia because inertia is the resistance to changes in motion. Newton's first Law shows that an object continues to move without changes in its motion until a force is imparted on it.
Every movement we make uses of Newton's 1st Law. Without the fist law of motion controlling motion is probably not even be possible. All possible methods of controlling motion depend on the first law. The 1st law of motion shows that motion remains the same without an outside force. We use it in every move we make.