"To put this into perspective, it’s helpful to understand what we call “ring progression”. Every day our build process compiles the latest changes our engineers have made and produces a build that is automatically sent out to our “Canary ring” – people in OSG who want to be the first to get started using and testing the newest code. Once we have validated with that group that the build is stable enough to use by more people, it is sent out to the next ring – all of OSG – where we validate it with that audience. From there we send it to tens of thousands of people here at Microsoft, and after it proves stable enough there, we make it available to you."
Microsoft has provided a nice illustration of this process in the following diagram.