Test your internet connection speed and latency here. Upload and download speeds should be at least 2 Mb/s, with a latency below 50 ms. If you think it is an internet connection issue:
Move closer to your WiFi router.
Move your router to an elevated position and/or closer to your location.
Turn WiFi off on other devices using the same network, especially if they are using high bandwidth activities (for example, Netflix/YouTube/Skype/FaceTime).
Switch to the 5GHz frequency on your wifi network.
Reduce the video definition quality in call settings.
Use an Ethernet cable connecting your computer to the router.
Invest in a new router, wifi extenders, or upgraded service with your internet provider.
Use a newer computer. Old computers will have a harder time processing the video, which can cause choppiness. Also, the camera or microphone may be damaged or too old to support an internet video call.
Check your network security settings, antivirus, firewall, or parental settings. You may have settings in place that are preventing you from making a connection.
If you experience poor audio quality,
If you hear an echo, use headphones or earbuds during a call. USB or inline mics are better than wireless Bluetooth headsets. If you still hear an echo, ask the other person in the call to reduce their overall volume or use headphones.
Move to a quieter environment.
Ensure no other applications on your device are already accessing your microphone.
Try a different microphone. If your microphone is embedded into your device (like a laptop or phone), try using a different external microphone device.
Turn the overall volume down rather than having it at full volume.