What is the difference between Salisbury Steak and hamburger?

Salisbury steak is a dish consisting of a ground meat patty, usually beef, that is pan-fried and then simmered in a gravy or sauce. It is typically served with mashed potatoes, vegetables, and gravy. Hamburgers, on the other hand, are made with ground beef that is grilled or fried and served on a bun with various toppings such as lettuce, tomato, onion, pickles, ketchup, and mustard. Salisbury steak is typically served as a main course, while hamburgers can be served as either a main course or a snack.