Channels are different milestones during the release of a new version. You can think of a channel as an ALPHA, BETA or STABLE version. Channels are shared between all of your products.
You can give each subscription to access all channels of a product or only to only a dedicated subset, like BETA.
The following diagram shows contains the channels
framed by a red border.
The releases 1.0.0-BETA and 1.0.1-BETA are assigned to the BETA channel. The STABLE channel has the releases 1.1-STABLE and 2.0-STABLE assigned. Please note that you can name your releases like you want. The suffix -STABLE and -BETA is just for demonstration purposes.