It is a type of file developed to run on Android operating system devices, that is, applications, which can also be games. However, since they are usually developed by smaller studios or even that do not follow some guidelines from official stores, they cannot be found on Google Play, for example.
The main advantage of this is that, in many cases, you'll find games and tools that don't even exist for the Android system on the official store, which brings new possibilities, whether for fun or to make your daily life easier and productive.
The main advantage of this is that, in many cases, you'll find games and tools that don't even exist for the Android system on the official store, which brings new possibilities, whether for fun or to make your daily life easier and productive.