In short, TCP will work hard to deliver 100% of the packets. So when a packet is lost, TCP asks to re-send the packet. This is fine to display a webpage or send

In short, TCP will work hard to deliver 100% of the packets. So when a packet is lost, TCP asks to re-send the packet. This is fine to display a webpage or send a file, but it can't be tolerated in games where time continuity matters. I think it's the same issue in VOIP and video conferencing too.