Beginner’s question WLAN

Hello, I have my EQB very fresh and go through the menus. I don’t really understand the user manual for settings/system/WiFi. I guess:Set up a WLAN hotspot (p.277) You can use a hotspot on your own mobile phone if you don’t have a communication module in the MBUX.Configuring a multimedia system as a WLAN hotspot for external devices (p.278) If you have an MBUX with a communication module, you can use it as a hotspot for your own mobile phone I don’t need either. the menu point Wi-Fi turned on/off and now doesn’t know what it was like. Actually, I mean Wi-Fi, because I don’t need anything, but when I turn it off, the message that lifetraffic was turned off (or something like that) appears. => How does Settings/System/Wi-Fi have to stand on or off?