Decorating cakes involves adding visual elements to enhance their appearance and make them more appealing. Common techniques include using frosting to create smooth surfaces or intricate designs, and adding fondant for a polished look. Decorations can also include sprinkles, edible glitter, or fruit to add color and texture. Tools like piping bags and various nozzles help create different patterns and shapes. Additionally, cake toppers such as candles or themed figures can personalize the cake for special occasions. Overall, cake decorating combines creativity and skill to transform a simple cake into a beautiful centerpiece.