Ethernet is significantly better than Wi-Fi for video calls. Wired connections provide consistent latency (typically 1-5ms vs 10-50ms on Wi-Fi), virtually zero packet loss, and no interference from other devices, walls, or microwave ovens. Wi-Fi introduces jitter because the signal strength fluctuates — this causes the choppy audio and frozen video frames that plague video calls. If you can't run an Ethernet cable, use a powerline adapter or a Wi-Fi 6 router with the 5GHz band for the best wireless experience. Position yourself within 15 feet of the router with a clear line of sight. During important calls, ask others on the network to pause downloads and streaming. A quick network test before the call will show you exactly how stable your connection is.