the.com/master of ceremonies

means The host who runs a show or event, introducing acts, guiding the program, and filling the gaps between them.

from From the title given to the official in charge of royal or religious ceremonies, who managed protocol and order at formal occasions — the phrase itself traces to Latin 'caerimonia' (ritual observance, reverence). Over time 'master of ceremonies' slid out of palace halls and into theaters, banquets, and broadcast studios, shortened in the 20th century to the clipped, jazzy 'MC' or 'emcee' it's known as today.