The term 'Layer of Lawn' is often referred to as 'SOD, ' which is a three-letter word. SOD is a layer of grass and soil that is used to create a lawn. It is typically composed of a combination of grass, soil, and other organic materials. SOD is often used to replace existing lawns or to create new ones. It is also used to repair damaged lawns or to improve the appearance of existing lawns. SOD is an important part of landscaping and is often used to create a beautiful and lush lawn.