https://www.techradar.com/news/android-oreo-features-release-date

Android Oreo is the name of the current version of Google’s mega-popular mobile operating system that's available now for select devices.

In terms of feature highlights, Oreo focuses primarily on speed and efficiency. For Google's phones updated to Android 8.0, another name for Oreo, boot time is cut nearly in half, and we've seen phones from other manufacturers speeding up, too. Additionally, the operating system update tackles pesky background activity that drains your battery and your data plan.