Facial expressions are the movements of the muscles in our face that show how we feel. They can express a wide range of emotions, such as happiness, sadness, anger, and surprise. For example, when someone smiles, it usually means they are feeling happy, while a frown can indicate sadness or displeasure. These expressions help us communicate without using words. People can often understand each other's feelings just by looking at their facial expressions. This non-verbal communication is important in our daily interactions, as it helps us connect with others. For instance, a raised eyebrow might suggest curiosity, while a tight-lipped smile could signal nervousness.