App pops up new features? window which self destructs

That is my accidental tap on the chat window made the message disappear never to be shown again. I can’t find anything about this on the site. The version is 1.2024.177 released two days ago and I saw the message earlier today. The window was almost as tall as the chat window on my tablet. So what was that about? Was that really about new features? or was that a pitch to upgrade to Plus?