The Google Webmaster Academy is a place you can go to learn the basics around making great web sites that world well with Google's search engine.
Just a couple months ago, Google made major changes and updates to the Google Webmaster Academy so I am unsure what "big news" they can be talking about today.
Google posted this on Friday, saying:
Stay tuned for some big #WebmasterAcademy news :)
Forum discussion at Google+.