Hi @HilaryP - I use collections and have changed them quite a bit over the years.
In my new shop, https://folksy.com/shops/HeidiMeier, my textile pictures are grouped into five ‘themes’ (Animal magic, fabulous Friends etc etc), then I have placed my giclee prints into two collections, one for limited edition and one for open run and the last collection comprises all my printed cards.
It’s hard knowing what the right collections should be for my artwork, so I thought maybe collections by subject matter might be the way people like to search for art. But it’s an ongoing task and I don’t know if it’s the right way. I like the fact I can put some items into more than one collection (although I’d like to think that everyone thinks like me, and if I’m looking at an artwork site then I look at everything the artist has done, just to make sure I don’t miss anything!! A bit like searching Rightmove for houses…!!).