How to change ‘about me’ section on blog/page

On each of my blog posts, there’s a brief description of me/the website. It starts with the word ‘trailsnet’ and gives a short bio. Unfortunately, it is out of date, and I’d like to change it, but I can’t figure out where/how to do that. I’m assuming it’s somewhere on my dashboard, but I don’t know where. Any suggestions will be greatly appreciated.

Thanks!!

The page I need help with: [log in to see the link]