Version: 2021.3
Android plug-in types
Introducing Android Library Projects and Android Archive plug-ins

Android Library Projects and Android Archive plug-ins

Android Libraries and Android Archives (AAR) are plug-inA set of code created outside of Unity that creates functionality in Unity. There are two kinds of plug-ins you can use in Unity: Managed plug-ins (managed .NET assemblies created with tools like Visual Studio) and Native plug-ins (platform-specific native code libraries). More info
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types that can contain C++ and Java code, resources such as assets, and a plug-in manifest file. You can use them to reuse components across multiple applications, or build variations of one application with the same core components.

Topic Description
Introducing Android Library Projects and Android Archive plug-ins Understand Android Library Projects and Android Archives.
Import an Android Library Project Import an Android Library Project into your Unity Project.
Import an Android Archive plug-in Import an Android Archive into your Unity Project.
Android plug-in types
Introducing Android Library Projects and Android Archive plug-ins