Almost all the portable gadgets we use today need to be connected to the internet. Instead of getting an individual internet connection for each of them, you can use one of them to create a personal, mobile Wi-Fi hotspot. All your other Wi-Fi enabled devices will then be able to connect to this hotspot and share the primary internet connection.
Apart from the practicality angle, there can be many uses for this. Your laptop can have high-speed internet connectivity on the move. Within your own network, you devices will be able to share data with each other. And you'll save quite a bit of cash at the end of the month if you share just one unlimited data plan with five other devices.source