the.com/announcer

means Someone whose job is to speak the words that describe an event aloud, usually to a crowd or over a broadcast, as it's happening.

from Traces back to Latin 'nuntiare,' to bring news or report, built from 'nuntius,' meaning messenger. Passed through French 'annoncer' before settling into English as 'announce,' with '-er' tacked on to name the person who does it — a direct descendant of the ancient job of running into town to shout that something has happened.