https://techcrunch.com/2017/12/04/googles-lightweight-os-android-go-launches-as-android-oreo-go-edition/

Google’s made a number of tweaks since announcing Android Go back at I/O in May. The lightweight version is finally ready to launch, albeit with a slightly altered name. The OS is launching with the release of Android 8.1, now carrying the decidedly less catchy Android Oreo (Go edition) title.

As per the new name, the Go version isn’t an altogether different operating system than the primary version of Android. In fact, in a number of ways, the software types are likely indistinguishable, and Google’s devoting a team to assuring that the Go edition gets updated and released on more or less the same schedule as its standard counterpart.