That Notes are you referring to on the home page? (I assume you're talking about the "My Home" page that appears after logging in.)
"Notes" has been accessible from the Tools menu for a long time, but I can find any kind of "notes" feature on the "My Home" page. I take a lot of notes, so I'm curious about what you're seeing. The church also does some limited testing of new features, so it's possible you see a new feature and not everyone can see it yet.