Teeth whitening is a cosmetic dental procedure aimed at lightening the color of teeth. It can be achieved through various methods, including over-the-counter products like whitening toothpaste and strips, as well as professional treatments performed by dentists. The process works by removing stains and discoloration caused by factors such as food, drinks, and smoking. The effectiveness of teeth whitening varies depending on the method used and the individual's dental health. While many people experience noticeable results, some may have sensitivity or uneven whitening. It's important to consult with a dentist to determine the best approach for achieving a brighter smile safely.