Google announced several new changes and policies to Android developers for better app security and performance on Google Play.
According to Android, for ensuring security and build up the performance of the Android platform, Google implementing some changes that are designed to promote a positive experience to users who like discovering and installing apps and games from the Play Store.
https://spinonews.com/2017/12/20/future-android-devices-wont-be-supporting-32-bit-apps/