Effective August 1st, Google Play will need new app submissions to target at least the Android 8.0 Oreos API. On November 1, all updates to existing apps must be targeted to the same API. At first glance, this change may mean little to you, but it will have a big impact on Android. Now your favorite apps will get better.
When an app is created, developers choose a target API based on the other version of Android. The version they target determines the tools available to build the app. These tools include enhancements to the management of background data, the use of permissions, security features, and several other features that enhance the usability of the app, and thus the overall performance of your device.
Target the latest version of Android. The reasons range from the unwillingness to spend time and resources to avoid new security features. But with Google's new policy, they'll have to use many of Oreo's new tools. As a result, with more apps you can take advantage of the latest Android features, making each new OS update more meaningful.
Better battery life
Google has continually improved Android to reduce battery consumption. With the Android versions of odler apps can be run in the background virtually unchecked to maintain data connections and resources such as RAM and CPU to consume while dealing with the battery.
With Android 8.0 (or API level 26), apps must now implement background execution limits. With very few exceptions, apps are always considered inactive when you are not actively using them, and they are prevented from starting new services in the background. Only under certain circumstances, a background app can get a temporary window to start the required services without restrictions.
Once your apps have been upgraded to Oreo, they are no longer exempt from these rules. Therefore, you should be able to notice a significant increase in battery life.