Wifi hotspots are wireless access points providing network and/or Internet access to mobile devices like your laptop or smartphone, typically in public locations.
Some devices and smartphones act as mobile wi-fi hotspots.Peripheral can be connected to your device through the wifi and connected devices will access the internet through mobile network.
Using a portable wifi hotspot will require your mobile data to be on, and will consume some data traffic
You need to note that using portable wifi hotspot may drain your battery life faster
You can configure wifi hotspot by setting up network SSID and password.
SSID (service set identifier) is the primary name associated with an 802.11 wireless local area network (WLAN) including home networks and public hotspot