Weight and balance refers to the distribution of weight in an aircraft, which is crucial for safe flight. Proper weight distribution ensures that the aircraft can be controlled effectively during takeoff, flight, and landing. If the weight is not balanced correctly, it can lead to difficulties in maneuvering and may increase the risk of accidents. In aviation, weight includes the aircraft itself, fuel, passengers, and cargo. The center of gravity, or CG, is the point where the weight is evenly distributed. Pilots must calculate the CG and total weight before each flight to ensure optimal performance and safety.