I am confused,what's the difference between "beta.freeCodeCamp" and "www.freeCodeCamp"

[arrbxr]

Our expanded curriculum is now live on beta.freecodecamp.com and we need your help QA'ing it

I’m thrilled to announce that our expanded curriculum is now live on https://beta.freecodecamp.com These challenges are still rough, and not all of them work properly yet. We are working to rapidly fix them, and you can help. Work through them click the “bug” button to create a GitHub issues when you discover something doesn’t work (be sure to search through existing issues first). You’ll also get to explore our React-powered single-page platform, which features Spanish-language challenges (an…