Quality (Grade) refers to the standard or level of excellence of a product or service. It is often assessed based on specific criteria, such as durability, performance, and reliability. Higher quality items typically meet or exceed customer expectations, while lower quality items may fall short. In various industries, quality is often categorized into grades, such as A, B, or C. These grades help consumers make informed choices by indicating the level of quality they can expect. For example, in food products, Grade A might signify the best quality, while Grade C could indicate lower quality or less desirable characteristics.