Question

Q 1.what does the video conferencing mean?
Q 2.How are both teleconferencing and videoconferencing useful

Answer 1

a.talking with two or more persons at a time

Answer 2

a system that allows people in different parts of the world to have a meeting by watching and listening to each other using video screens

Video conferencing helps to improve communication and re-establish relationships. During a video conference you get to see the body language and facial expressions of the participants. This leads to a more effective and faster collaboration

hope it will help you