Product development is the process of creating new products or improving existing products. It can involve creating something completely new, like a toy, or changing an existing product, like making a car more fuel-efficient. It can also include adding new features to an existing product, like putting a camera on a phone. Product development involves research, design, testing, and manufacturing to bring a product from concept to reality. The process often starts with an idea or a problem that needs to be solved and is then developed into a plan that is implemented to create a solution. Finally, the product is tested and improved until it is ready to be used by the public.