@Rahul88
An APK (Android Package Kit) is the file format used by Android to distribute and install apps. It contains all the elements needed for an app to function, including code, resources, assets, certificates, and the manifest file. APK files are essentially zip archives that can be installed manually on Android devices or distributed via platforms like Google Play. Developers use APKs for testing and sharing apps before official release. Users should only install APKs from trusted sources to avoid security risks, as malicious APKs can harm devices or steal data.