@Arya669
An APK (Android Package Kit) is the file format used by Android to distribute and install apps. It contains all the necessary components of an app, including code, resources, assets, and manifest files. APKs are similar to .exe files on Windows. Users can download APKs from the Google Play Store or third-party sources. Installing APKs manually is called "sideloading." While convenient, it's important to ensure the APK comes from a trusted source to avoid malware. Developers also use APKs to test apps before releasing them officially.