What determines the strength of WiFi signal?

What is the difference between WiFi2.4G and 5G?

The Wi-Fi Alliance stated that Wi-Fi 6E will be particularly suitable for AR and VR, and it will also help solve the problem of insufficient Wi-Fi spectrum. It can provide continuous channels that can accommodate 14 additional 80MHz channels and 7 additional 160MHz channels Spectrum block, due to more channels and wider spectrum space, interference between Wi-Fi networks will also be reduced. Alth···