What is build variants in Android?

Build variants are the result of Gradle using a specific set of rules to combine settings, code, and resources configured in your build types and product flavors. Although you do not configure build variants directly, you do configure the build types and product flavors that form them.

What does Android build mean?

The Android build system compiles app resources and source code, and packages them into APKs or Android App Bundles that you can test, deploy, sign, and distribute.