Glycoside hydrolases are enzymes that catalyze the hydrolysis of glycosidic bonds in carbohydrates. They play a crucial role in breaking down complex sugars into simpler sugars, which can be utilized by organisms for energy and metabolism. These enzymes are found in various organisms, including bacteria, fungi, and plants. These enzymes are classified into different families based on their amino acid sequences and catalytic mechanisms. Glycoside hydrolases are essential in various biological processes, such as digestion and cell wall degradation, and have applications in industries like biofuel production and food processing.