You should typically use the latest version of Build-Tools, but your project's build.gradle file may specify a specific version for stability. How to Download Build Tools Using the SDK Manager

Android SDK Build-Tools are essential components of the Android SDK required to compile, debug, and package your Android applications into executable files like APKs or App Bundles. While Android Studio often handles these downloads automatically, developers frequently need to manually download or update specific versions to maintain project compatibility. Understanding Android SDK Build-Tools

The most reliable way to download build tools is through the built directly into Android Studio. Android Developershttps://developer.android.com Update the IDE and SDK tools | Android Studio

Build tools include low-level utilities like aapt2 (Android Asset Packaging Tool), d8 (DEX compiler), and zipalign . These tools are decoupled from the main SDK platforms, allowing Google to update them independently of the Android operating system versions.