Do you know we are using laptops as a wifi router?

You can share your laptop or desktop Internet connection via Wi-Fi to other devices, and for the most part, it's quite simple. Mac users face no trouble at all, as setting up Internet sharing in OS X is just a couple of click away, but for Windows users the process can be a little bit more laboured. The built-in options don't always cut it due to the complicated setup and reliability problems.

It's very easy to do so because it's so Old