Consider this a free page, as not everyone likes to have an "about me" section on their site. If it's not an about me page, consider turning it into a plots page, or even a character page. If you're the type to create and reuse characters, it might be interesting to have a short explanation as to a handful of your favorites to play as. If not, you could also do a samples page! A lot of potential partners benefit from seeing writing samples from someone before contacting them. Keep in mind that writing samples can be a double-edged sword. While they can pull in writers that fit your style, they can also push others away.
It's also reasonable to do all four. Why not have an about me, a plots page, a character page, and a page for writing samples? Weebly is great in that way, they let you have up to ten pages for free. Make use of them!
However, if you're going to turn this into an "about me" page, here's what I would suggest adding: things like your name, a vague idea of where you're from (just to get an idea of time zone, don't get specific!), your age (or just that you're 18+), and anything else that you think is interesting about yourself.
I've seen people include their favorite TV shows/movies, some of their favorite writing partners and then link back to their site (get their permission, first!), what they went to school for, random hobbies, and even links to some really amazing art portfolios.