The fruit traditionally used to make cider is the apple. Various apple varieties are used to create cider, ranging from sweet to tart, and this contributes to the diverse flavors and styles of cider available today. The fermentation process of apples involves pressing the fruit to extract juice, which is then fermented with yeast. Different regions have their own cider-making traditions, and factors such as apple selection, fermentation methods, and aging processes can significantly influence the final product. Cider is popular in many cultures, particularly in Europe and North America.