The Big Mac gave McDonald's the “Big Mac” name used in a 1968 national advertising campaign.
McDonald's introduced the sandwich in the late 1960s after it had been developed and tested in the Pittsburgh area. It used two beef patties, a middle bun section, lettuce, cheese, pickles, onions, and Big Mac sauce, creating a distinctive product identity within the chain's menu.
The sandwich became a major branding asset because its name was short, memorable, and easy to use in advertising. McDonald's promoted it nationally in 1968, helping establish the Big Mac as an item with recognition beyond individual restaurants.
The Big Mac is sometimes confused with the Quarter Pounder because both became signature McDonald's sandwiches. Their defining differences include the Big Mac's three-part bun and two smaller patties, compared with the Quarter Pounder's single larger patty.