Answer:
Provision of both audio and video
,dedicated support
Explanation:
Free services are not dedicated digital lines so there is no guarantee of high-quality sound or a reliable connection during the call. Some common issues are background noises, crackling, echoes, distortion, quietness and drop-outs.Free services also don't offer dedicated support so if anything goes wrong there's nobody available to help you. Any of these problems can ruin the productivity and flow of your meeting.
