It is easy to make a webcam that performs poorly for certain scenarios, particularly with poor lighting, or when mounted to a monitor that has integrated speakers. Jitter in audio causes problems with automatic echo cancellation.

It is much less important than in the 2010's. At that time, Skype certified cameras to provide h264 encoding in the camera. Those encoded frames would then pass through directly to the network. That kind of encoding is very demanding technically, so certification had plenty of value. Today's MJPEG cameras don't benefit as much.