Fats play a crucial role in a healthy diet by providing energy, aiding nutrient absorption, and supporting cell growth. They help the body absorb fat-soluble vitamins such as A, D, E, and K. Healthy fats, particularly unsaturated fats found in foods like avocados, nuts, and olive oil, can improve heart health and lower bad cholesterol levels. Additionally, fats are essential for the production of hormones and contribute to overall satiety in meals, helping control appetite. Therefore, incorporating balanced sources of healthy fats is fundamental for optimal health.