Start by defining your goal: screen protection, a protective case, or a combination that covers both. For screen protection, you can choose a full-glue edge-to-edge tempered glass that shields the entire display, or a privacy-style protector that limits viewing angles. For cases, decide between lightweight silicone for everyday use or a MagSafe-compatible clear shell if you rely on wireless charging. Consider color and finish options—black, white, or transparent—and check for extra features such as camera protection or rugged durability when you need tougher protection.