Advise for an interview: SEO Audit on a very well known website and Some content idea

Hello, I'm a junior SEO and I'm going to have an interview soon. I had an assignment that I'm not 100% sure on whether I'm doing it correctly or not. I'l like to have your advise on how to proceed. They ask me to do an audit and to come up with some content ideas for a very well known website, but as the test requirement are written on a domain specific language (I believe) that I'm not sure I'm entirely understanding it. Would you like to help?