LibGDX provides six core modules that allow you to access various parts of the system your application will run on. What makes these modules so great for you as a developer is that they provide you with a single Application Programming Interface (API) to achieve the same effect on more than just one platform. This is extremely powerful because you can now focus on your own application and do not have to bother with the specialties that each platform inevitably brings, including the nasty little bugs that might require tricky workarounds. This is all going to be transparently handled in a straightforward API, which is categorized into logic modules and is globally available anywhere in your code as every module is accessible as a static field in the Gdx class.