When you first download the app it consists out of 50 quotes. If you want you can delete or select all of them and add your own quotes.
Here you can set your alerts. You can get notifications up to 6 times a day. The button ‚Set all favorite‘ changes all quotes into a filled star and they will appear randomly in your alerts.
You do not understand how the app works than just go to Information and read the 4 small paragraphs.