Kinda surprised how few mentions this has. I use it for my personal website which I made using Hugo. That's what I used it for even before I was hosting any services.
Always wanted a "personal" website but felt I wasn't creative enough to create anything useful enough... Maybe a wiki was the best I could come up with
Care to share what you use the website for exactly?
I've read many times that If in doubt turn it into a blog and write down whatever you have learned that day. I have an entry that is simply a how to list all local variables in python.