Cider is the beverage made by fermenting apples. The process involves crushing apple fruit to extract juice, which is then fermented by adding yeast. During fermentation, the sugars in the apple juice convert into alcohol and carbon dioxide, producing a drink that can range from sweet to dry, depending on the fermentation time and apple variety used. Cider can be still or sparkling and is enjoyed in various cultures around the world. It also has gained popularity as a gluten-free alternative to beer and is often infused with spices or other fruits for additional flavors.