What is MITM (Man in the middle)?

A man-in-the-middle (MitM) addresses a kind of cyberattack. Man in the middle attack is a cyberattack where the attacker secretly relays and possibly alters the transmission between two parties who accept that they are straightforwardly speaking with one another, as the attacker has inserted themselves between the two parties. The attacker can be a listener in the discussion, quietly taking mysteries, altering the contents of your messages.