Carbohydrate-Binding Modules (CBMs) are protein domains that specifically bind to carbohydrates, enhancing the efficiency of enzymes that break down complex sugars. They are commonly found in enzymes like cellulases and amylases, which play crucial roles in the degradation of plant materials and starches. CBMs help these enzymes attach to their carbohydrate substrates, increasing their local concentration and facilitating the breakdown process. By improving enzyme activity, CBMs are important in various applications, including biofuel production and the food industry, where they assist in the processing of plant-based materials.