Use your camera when talking. This helps the group to identify who is talking and aids understanding.
Mute your microphone to reduce background noise.
Use functions like the chat window and icon buttons to contribute. More functions are being added regularly so keep yourself updated.
Be aware of your surroundings. Try to ensure your set-up is favourable for learning and will minimise distractions.
Finally, if you are forced to leave the session before it finishes let the trainer know as if you were physically leaving a face-to-face training session