Welcome to the Windows Insider Program
Source: From Windows Insider Program YouTube Channel.
The Windows Insider Program is a community of millions of Windows' biggest fans who get to be the first to see what's next in Windows. Windows Insiders run previews of the platform, called Windows Insider Preview Builds, to see the new features. While previewing Windows, Insiders can provide feedback and engage directly with Microsoft engineers to help shape the future of Windows.
Click here to register for the Windows Insider Program