Catalina Capabilities?

A few weeks ago I downloaded Catalina. After that whenever I turned it on it would give me a notification to click here and see all the stuff that Catalina can do. I kept putting it off to remind me tomorrow instead of taking the time to see. Of course one day I clicked on the wrong button on the notification and the possibilities of Catalina never came back again. Is there any place where I can see what it was trying to show me and everything it can do?

Thank you.