When it comes to learning computer programming, Ruby is often singled out as a good place to start. It's creator wanted to improve programmer productivity while making programming more fun, and this has led to its relative simplicity, making it a good language to start with.
OAuth is becoming a very popular way to control authorized access to Web APIs and the data that they return. Although it's one of the most straightforward ways to accomplish this, it's still rather confusing to use. If your API uses OAuth, then you need to be able to describe it so that developers can quickly understand what they need to do.