Junk food refers to food that is high in calories but low in nutritional value. It often contains excessive amounts of sugar, salt, and unhealthy fats. Common examples include potato chips, soda, candy, and fast food. While these foods can be tasty and convenient, they are not beneficial for overall health when consumed in large quantities. Many people enjoy junk food for its flavor and quick availability. However, regular consumption can lead to health issues such as obesity, heart disease, and diabetes. It is important to balance junk food with healthier options like fruits, vegetables, and whole grains to maintain a nutritious diet.