The Microsoft Wireless Display Adapter V2 allows you to share the screen of your portable Windows device like a laptop or smartphone on a large screen TV. Some examples of ideal use cases are Powerpoint presentations and gaming.
I have a detailed review of this device below which you can check out. Improvements over version 1 are reduced lag and smaller form factor. This type of accessory is required is you need to seamlessly connect your laptop or computer screen that is running Windows 10 to a large screen TV set. Some use cases that are ideal for the use of this gadget are when Powerpoint presentations are required or if you need a larger screen for Windows games.
Get the Wireless Display Adapter (V2) from Amazon here.
See the review of the first generation display adapter here.