Write content for the landing page from the "Information" and "Discussion" links in the Beta Feature preferences pages. I.e. [[Special:Preferences#mw-prefsection-betafeatures]]
Deadline: before the Beta release on wikis.
 what people see
 why there is two badges
 what happen when you have a message on you own talk page
 differences when Flow is activated or not on a wiki
 What's new compared to the previous system