McDonald's introduced the fictional McDonaldland characters in a national advertising campaign in 1971.
McDonaldland turned the restaurant brand into a colorful fantasy setting populated by Ronald McDonald and characters such as the Hamburglar, Grimace, Mayor McCheese, and Birdie. The campaign was designed especially to attract children's attention and make the brand world easy to remember.
The characters appeared in television commercials, restaurant decorations, merchandise, and promotional materials. Their exaggerated designs gave McDonald's a recognizable cast rather than relying only on food photography or a corporate logo.
McDonaldland was not the same thing as the restaurant chain itself. It was a fictional advertising universe created to support the brand. Some characters were later used less frequently or retired, but the campaign remains an important chapter in McDonald's branding history and in the development of character-based fast-food advertising.