The document discusses reasons to start learning Android app development, including that it is a large and growing industry, most people now use smartphones, and it allows one to work remotely and potentially start a successful career at a young age. It provides tips for getting started, such as buying a smartphone, reading books on app development, attending meetups, observing other developers, watching tutorials, and beginning to code. The document also presents three approaches for initial app ideas: creating something innovative, improving an existing app, or tying an app to current events.