It's what Google thinks is for low spec mobile devices. Oreo - Go Edition can work with devices with RAM as low as 512 MB. Google will be working with hardware vendors to offer entry level smart phones running Oreo Go Edition
Source : Google blog
Android Oreo devices with 512MB to 1GB of memory will come with the all the Go optimizations. This Android Oreo (Go edition) experience is made up of three key components:
Go big with faster performance, more storage, data management, and security
- Operating System: Performance and storage improvements to the OS with data management features and security benefits built-in.
- Google Apps: A new set of Google apps, designed to be lighter and relevant to the unique needs of people who are coming online for the first time.
- Google Play Store: A tuned version of the Google Play Store that allows you to download any app, but also highlights the apps designed to work best on your device.
We enhanced Android Oreo (Go edition) for speed and reliability on entry-level devices, which means the average app is now 15 percent faster on devices running Android Oreo (Go edition). There are many of these kinds of optimizations—and they really add up. If all entry level Android devices launched apps 15 percent faster, that would save the world a cumulative one million hours of time—every day!
Source : Google blog