What is the mcu multiverse?

The Marvel Cinematic Universe is a series of American superhero films produced by Marvel Studios, based on characters that appear in publications by Marvel Comics. Since its inception in 2007, Marvel Studios has released 37 films and has at least nine more in development. The MCU is a shared universe in which all of these films take place, with a large, often ensemble, cast and a diverse array of directors and writers. Marvel Studios president Kevin Feige has produced every film in the franchise. The provided evidence does not include a definition or description of a multiverse within the MCU, so it cannot be elaborated upon beyond stating that the concept is not covered here.