Depression is a common and serious mental health condition that affects individuals of all ages, characterized by persistent feelings of sadness, hopelessness, and a lack of interest or pleasure in daily activities. In children, depression may present as irritability, withdrawal from social interactions, and difficulty concentrating, which can impact academic performance and relationships. In adults, depression can lead to fatigue, changes in appetite or sleep patterns, and difficulty making decisions, often affecting work performance and personal relationships. Various types of depression exist, including Major Depressive Disorder, Persistent Depressive Disorder, Bipolar Disorder, and Seasonal Affective Disorder. The symptoms of depression can significantly impair daily functioning, highlighting the importance of early diagnosis and tailored treatment options, which may include psychotherapy, medication, and lifestyle changes to help individuals regain their sense of well-being and improve their quality of life.