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.

Unity - Manual: Preferences

How To Obb Files From Google Play - Colaboratory

WebGL: Deploying compressed builds - Unity Manual

Unity - Manual: Inside the Android build process

Big (up to 4GB) Expansion File Support how? - Meta Community

Unity - Manual: Setting up Performance Reporting

Texture Import Settings - Unity Manual

Google Play Asset Delivery Reference

How To Obb Files From Google Play - Colaboratory

Download Debugging Usb Password Apk - Colaboratory

Publish an APK with OBB in Unity

Managing and publishing your game on the UDP console