When you think of an author you often imagine an individual writing a book, article, or some other long form of writing. You may even go further and think of an unknown person writing something on behalf of a government agency or a team of individuals working together on a research paper. The reality is that anyone can be an author of something. I am the author of this page. You are the author of anything you post online.
It's important to know who wrote something and the qualifications they have that make them capable of writing about the topic. This can be challenging so here are some examples of different author backgrounds and amounts of information given.