@LynKinn I learned this difference the hard way - after I had spent time on the website liking various sits. I’ll just mention that I don’t think, after you’ve set up your phone, that the ones you’ve liked on the website will then generate notifications. I think only those you like directly on the app will send the notifications, so you may have to repeat the likes.
Vanessa has captured great images for the phone settings. I’ll add the link below - look at entries #14 & #16.