The uni-lettered V is a web-based dashboard that runs inside of the VR apps you know and love, allowing you to access web apps like Netflix, Spotify, Slack, and do pretty much anything else you can do through a web browser. A new update to the V beta brings support for the HTC Vive and other SteamVR headsets.
Launching initially back in 2016 in beta for the Oculus Rift, V gives players a web-based dashboard, making it possible to browse the web or use web apps while inside of VR. Since the beta launch the app has seen steady improvements, including support for the Touch motion controllers.
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Source: Road to VR