Please tell about the purpose of grain cleaning process?

Grain cleaning is a process used to remove unwanted materials from grain before it is used. This process can include removing dust, dirt, stones, weed seeds and other debris that can contaminate the grain. It also helps to improve the appearance of the grain and make it more suitable for storage or use in food products. Grain cleaning is an important part of ensuring that grains are safe and free from contaminants when they reach consumers.