The portable wi-fi hotspot is used to share internet connection to other wireless devices.

A portable Wi-Fi hotspot on an Android device refers to the ability to turn your smartphone or tablet into a mobile Wi-Fi access point. This allows other devices, such as laptops, tablets, or other smartphones, to connect to the internet using the mobile data connection of the Android device. Essentially, it enables you to share your device’s internet connection with other devices wirelessly, creating a small local Wi-Fi network. This feature is useful when you don’t have access to a traditional Wi-Fi network but want to connect other devices to the internet using your mobile data.