An improvisational performance is one that's made up as it goes along. It might seem spontaneous and unprepared, but often there's still planning involved.
Improvisation is usually associated with acting, music, or comedy - like a stand-up comedian who makes jokes on the spot or an actor who creates their character right in front of the audience. But improvisational skills can also come in handy for other things, like public speaking or even writing. If you're a journalist, for example, you might need to think quickly and come up with questions on the fly when interviewing someone unexpected. Improvisation is about thinking creatively and responding to situations as they arise - it's not just about making something up out of thin air.
Having the nature of an improvisation.
