https://www.bleepingcomputer.com/news/microsoft/microsoft-officially-launches-windows-10-insider-channels/

Microsoft today announced that the new Windows Insider Channels are rolling out to Windows 10 customers enrolled in the program as announced earlier this month, on June 15.

Windows Insiders' devices will be automatically moved to channels based on the currently selected ring and on the quality of the experienced they are expecting, without any user interaction.