Eyebrows are strips of hair located above the eyes on the human face. They serve several functions, including protecting the eyes from moisture, such as sweat and rain, and helping to express emotions through movement. The shape and thickness of eyebrows can vary widely among individuals and can be influenced by genetics and grooming practices. In addition to their functional roles, eyebrows also play a significant part in nonverbal communication. They can enhance facial expressions, making it easier for others to interpret feelings like surprise, anger, or happiness. Many people choose to shape or color their eyebrows for aesthetic reasons, often using products like pencil or gel.