Android app development involves creating software applications that run on devices powered by the Android operating system. Developers use programming languages such as Java or Kotlin, along with development tools like Android Studio, to build these apps. The process typically includes designing user interfaces, writing code to implement functionality, testing for bugs and performance issues, and finally, deploying the app to the Google Play Store or other distribution channels. Android developers must consider various device screen sizes, resolutions, and hardware capabilities to ensure compatibility and optimal user experience. Continuous learning and staying updated with the latest Android development trends and best practices are essential for success in this dynamic field.