Android is an operating system based on Linux with a Java programming interface. The Android SDK provides tools for developing Android apps, including a compiler, debugger, emulator, and virtual machine. Before developing an Android app, developers should have knowledge of core Java and XML for screen layouts. Google Play is a service where developers can offer Android apps to users, with a one-time $25 fee to upload apps and required assets. The presentation discusses an Android app being developed through a company's professional development program to benefit both employee growth and company growth. The app allows users to login, access course contents including videos and PDFs, take quizzes, and chat.