https://www.cnet.com/news/android-go-arrives-at-samsung-in-its-thrifty-galaxy-j2-core/

Android Go is the closest you can get to the stock version of Google's operating system on a non-Google phone -- it's Google's bloatskrieg against the irritating mass of third-party software that ships on many Android phones. It also includes tools to help manage data consumption for areas where your signal isn't always great or data is too expensive. 

Google created it for regions with a high cost of living relative to income, which tends to go hand in hand with poor signal coverage. Into that market Samsung is launching its first Android Go phone, the entry-level Galaxy J2 Core.