That is the default content for the three basic app pages – Home, Giving and Groups.
You’ve already edited Home and Groups by the looks of things. Dashboard>App Content is the place to go on your website!
On the giving page – that lovely form for the website won’t work yet, so I add a link to our giving page on the website for that one on our app. I’m working on it, but Apple are a bit funny about payment pages that don’t use their in app payments on community apps.