Hi there @samtsejerome welcome to the community!
I’d recommend starting here to get an overview of Auth0 and Identity in general. With some fundamentals in hand getting into a sample app should be much more straight forward 
With regards to the audience in particular (it’s a common confusion point), the following FAQ should be helpful:
https://community.auth0.com/t/what-is-the-audience/71414
Let us know if you have specific questions moving forward!