I’ve had to do business calls over the past year and struggle to understand the person on the other end using atrociously bad audio—frustrating to the point of having a hard time following the conversation. Ditto for various companies. I don’t know what kind of garbage (Bluetooth?) headset or microphone is being used, but the difficulty has driven me to the point of refusing the call if the person cannot switch to a regular cell phone. It’s been that bad in some cases.
A real microphone can be a big improvment for Zoom calls and similar. I bought the one below with the mini tripod stand for podcasts, though I never put it into use. So I gave it to my daughter, whose courses are online and who also works as a TA for some engineering courses.
Compared to her MacBook Pro built-in microphone, my daughter says this microphone is a big step up for recording audio, and that her cohorts say there is a lot less background noise and less white noise.