Lex Friedman writes about his experience in improv classes with The Groundlings:
It turns out that some of these improvisational tips are pretty good life lessons. Space work and eye contact is really about being keyed into what everyone else in your scene is doing, and “yes, and” is all about actively listening to what your scene partners say, and genuinely responding. (It’s painful to watch two improvisers, each with her own agenda, each ignoring her partner’s lines to instead further the scene she has in her mind.)
A good improviser can thus be a pretty good communicator in general. Listen, build on the conversation, don’t spend all your time faux-listening but really plotting what you’re planning to say next; instead, first be confident and then, when you’re done listening, you can contribute meaningfully in response.