It's a website. And a simple one, at that. There's really nothing here for you to "use," as it were. It just spits stuff at you if you poke it. This page is helpful only to people who have life-changing experiences in the self-help section at WH Smith.
You may interact with this website in any way that makes sense. If it were your car, don't do wheelies with it in the park. Were it somebody else's car, don't steal it. And were it a rental, don't return it with the seats covered in marmite. (Also, don't eat marmite. It's revolting.)
You may not be a puswagon or any derivation of individual that doesn't understand what reasonable use of a website is. It's my property. Standard shit applies. Ignorantia iuris nocet.