Here at Nook Services, you can do many things, including:
Track your bug, fish, fossil, recipe, and art collections
Search and favourite custom designs
If you want to, you can sign up with reddit or discord account, to:
Share your collections with others
Share your own custom designs
Nook Services is not endorsed by Nintendo and does not reflect the views or opinions of Nintendo or anyone officially involved in producing or managing Animal Crossing. Animal Crossing is a trademark or registered trademark of Nintendo.