Smartphone cases are protective coverings designed to shield mobile devices from damage. They come in various materials, such as plastic, silicone, and leather, and can help prevent scratches, drops, and other impacts. Many cases also offer additional features, like card slots or kickstands, enhancing the phone's functionality. These cases are available in numerous styles, colors, and designs, allowing users to personalize their devices. Popular brands, such as OtterBox and Speck, provide options for different smartphone models, ensuring a snug fit. Choosing the right case can help extend the lifespan of a smartphone while adding a touch of personal style.