What is Wi-Fi Direct?

Wi-Fi Direct allows devices to connect and share the files directly through Wi-Fi, at a range and speed beyond the capabilities of Bluetooth.
Some of the most common uses of Wi-Fi Direct include:
1. Fast file sharing: Direct is an excellent way to quickly share large files with a friend or team when setting up wired connections isn’t feasible.
2. Screencasting and screen-sharing: From playing mobile games on a big screen to sharing family photos on your TV or digital portrait, Wi-Fi Direct is used for screen-sharing tasks.
For phone (1), the Wi-Fi direct is fundamental for Nearby share, Cast screen-sharing, etc. It cannot file transfer or screencast independently.