5G Wi-Fi (802.11ac) refers to Wi-Fi operating in the 5Ghz radio wave band and using the 802.11ac protocol.
Higher wireless transmission speed is the biggest feature of 5G Wi-Fi. The industry believes that the entry-level speed of 5G Wi-Fi is 433Mbps, which is at least three times the rate of Wi-Fi, and some high-performance 5G Wi-Fi can reach more than 1Gbps.
There is a misunderstanding here. Wi-Fi running in the 5Ghz band is not 5G Wi-Fi. The Wi-Fi protocol standards running in the 5Ghz band include 802.11a (first generation), 802.11n (fourth generation, running at the same time) 2.4Ghz and 5Ghz dual-band) and 802.11ac (fifth generation), and only Wi-Fi using the 802.11ac protocol is true 5G Wi-Fi.