Use your PC as a mobile hotspot in windows 10

Turn your Windows 10 PC into a mobile hotspot by sharing your Internet connection with other devices over Wi-Fi. You can share a Wi-Fi, Ethernet, or cellular data connection. If your PC has a cellular data connection and you share it, it will use data from your data plan.

• Press the windows key +I
• Select the menu Network & Internet
• then select Mobile Hotspot from Menu 
• For Share my Internet connection from, choose the Internet connection you want to share.
• Select Edit > enter a new network name and password > Save.

Like this 

Turn on Share my Internet connection with other devices.
To connect on the other device, go to the Wi-Fi settings on that device, find your network name, select it, enter the password, and then connect.