A decent dynamic mic handles background noise well by design, as opposed to using software to attempt to process the dirty signal coming from a tiny ECM. I can comfortably take a call on my setup while people are talking next to me and with the TV on. If you want to go further there are ENG mics which can handle even noisier environments - think an interview in the middle of Times Square.
A mixer or interface also allows you to monitor the microphone signal in your headphones or speakers. It keeps your tone and volume more consistent and you'll immediately notice if you accidentally back away from the mic (as opposed to the other side complaining they can't hear).
A mixer or interface also allows you to monitor the microphone signal in your headphones or speakers. It keeps your tone and volume more consistent and you'll immediately notice if you accidentally back away from the mic (as opposed to the other side complaining they can't hear).