MC is an acronym for Master of ceremonies, which is pronounced "eme ci". an MC can be a artist who works in scope musicalor it could be the presenter of a certain event that is not necessarily linked to a musical manifestation.
In the musical context, the first manifestations of an MC emerged in Jamaican music, where at parties (often in dance halls), men used the microphone to cheer up the audience. However, at that time these individuals were not yet known as MCs. Later in the States Unidos, the MC in the functions known nowadays, appeared in the scope of Hip Hop, where he brought animation to the parties.
In many cases, the MC helps the DJ's work, because while he "plays" the music, the MC interacts with the audience, creating a more immersive environment. The MCs also compose and sing their own material, or improvise, making up lyrics on the spot, something known as freestyle.
In Brazil, MCs have gained a lot of popularity in recent years and are usually included in the hip hop and funk music genre, and currently most MCs are involved in funk. MCs typically write their lyrics and communicate them to the audience in rap. Depending on the music genre adopted (hip hop or funk), the MC's acting style will be very different.
Some of the best known MCs in Brazil are: MC Coringa, Mano Brown, MC Marechal, Criolo, Nocivo Shomon, etc.
The Master of Ceremonies as event presenter, has the function of presenting guests and groups that have a scheduled performance at the event. In addition, the MC has the important function of captivating the audience (the one present in the place and the television audience), and for that it has to be relevant and, depending on the situations, funny. There is often a pair of presenters, who interact with each other and with the audience. The Oscars (the most important award-giving event in the film world) is one of the most important occasions where a person can exercise the role of Master of Ceremonies.