Depression is a mental health disorder characterized by feelings of sadness, hopelessness, and worthlessness that can affect a person's thoughts, behavior, and physical well-being. It can be caused by various factors such as genetics, life events or chemical imbalances in the brain. People with depression may experience symptoms like lack of interest in activities they used to enjoy, changes in appetite or sleep patterns, feelings of guilt or helplessness, difficulty concentrating or making decisions, and thoughts of death or suicide. Depression is a serious condition that requires professional treatment, but there are many effective therapies and medications available to help people manage their symptoms and improve their quality of life.