Support for APK expansion files (OBB) - Unity Manual

APK expansion files are used as a solution for the 100MB app size limit in the Google Play Store. If your app is larger than 100MB (which is quite likely for a big game), you have to split your output package into the main part (APK) and the expansion file (OBB). Refer to the Android Developer documentation on expansion files for more information.

Google Play Asset Delivery Reference

Unity - Manual: Offline / Manual Activation

Unity - Manual: AAR plug-ins and Android Libraries

WebGL: Deploying compressed builds - Unity Manual

Simple Tutorial for Winlator ( new windows emulator) : r

Unity - Manual: Android environment setup

Unity - Manual: Setting up Performance Reporting

Unity - Manual: Offline documentation

Unity - Manual: Plugin Inspector

Unity - Manual: Android Player Settings