Wi-Fi Hotspot is a marvelous feature that allows you to use your Android phone or tablet as a router. Thus, you can share your mobile Internet connection via Wi-Fi with other devices: tablets, laptops, another phones, desktops, anything else that has built-in or external 802.11a/b/g/n compatible wireless module (or a Bluetooth capability as a backup variant).
Thus, you can connect several client devices to your hotspot and consequently to the Internet at the same time. Of course, they will share your bandwidth and the Internet speed will decrease proportionally. In Wi-Fi Hotspot mode your mobile data functions as the WAN port of a router and your Wi-Fi interface – as LAN ports. Here is our guide on how to set up a Wi-Fi hotspot on Android 8 and 7 and use your Android phone as a router.