👉 Depression is a mental illness characterized by persistent feelings of sadness, hopelessness, and unease. It often involves low self-esteem, difficulty concentrating or making decisions, and a lack of motivation to engage in normal activities. The severity of depression can vary from mild to severe, with more severe cases leading to suicidal thoughts or attempts. Treatment for depression includes medication and therapy, and it's important for people experiencing symptoms to seek professional help as soon as possible.