APKs (Android Package Kits) are the file format used to install applications on Android devices. Each APK file contains essential components like code, resources, assets, and certificates needed for the app to function properly. APKs allow users to manually install apps outside the Google Play Store, which is useful for beta testing or accessing region-restricted apps. However, downloading APKs from unverified sources can pose security risks like malware and data theft. Developers use APK files for testing before official release. Some modded APKs offer additional features but may violate terms of service. Always download APKs from trusted sources. https://modsapk.org