McWorld was the name of McDonald's 1990s advertising campaign built around an imaginary online-style world.
The campaign presented McDonald's as a place connected with technology, adventure, and a youthful global culture. Its name used the “Mc” prefix that had become strongly associated with the company's menu branding and corporate identity.
McWorld belongs to a later period than McDonaldland. McDonaldland centered on recurring fantasy characters such as Ronald McDonald and Mayor McCheese, while McWorld used a more contemporary world-building concept aimed at children and families in the 1990s.
The campaign is sometimes confused with the chain's other major slogans and character programs. It was an advertising concept, not the name of a permanent restaurant format or a separate McDonald's subsidiary.