Microphones become very handy in the production of video movies, and in oral presentations.
In the latter case, we have two podiums with a microphone and built in speaker for students and staff to use in group presentation work. For movie making, we have three cameras that can have a microphone plugged in. The camera will pick up sound nearby with their own built in mics., but I have always found that a remote mike works best. We have several mics. available with 25 foot extension cords. However, life is never easy, and you must choose your mic. to fit the needs.