What was McDonald's advertising world of characters called, introduced in 1971?

McDonald's advertising world of characters was called McDonaldland, introduced in 1971.

McDonaldland presented McDonald's products and mascots as part of a colorful fantasy setting. Ronald McDonald was its central character, and the world included figures such as the Hamburglar, Grimace, Mayor McCheese, and Officer Big Mac. The campaign appeared in television commercials, restaurant promotions, and merchandise.

The imaginative setting was intended to make McDonald's especially attractive to children. Each character had visual or verbal links to the menu: Mayor McCheese had a cheeseburger head, while Officer Big Mac reflected the Big Mac product. These associations made the advertising world easy for young audiences to recognize.

McDonaldland is sometimes confused with the name of a restaurant or an actual theme park. It was primarily a fictional advertising setting. McDonald's gradually reduced the use of many of its characters, although Ronald McDonald remained the best-known figure from the campaign.