Oh ho. This isn't obvious to everyone? Well, OHHH kay. Think about it like this - pair these slides with anything you would wear "cute" sneakers with. Not your gym sneakers (although these are awesome to wear to/from spin/barre class etc.) but like, your Stan Smiths', your All Stars', your pristine white Nikes'. They go great with skirts of all kinds (denim, floral, aline, suede, leather) to give a more punk rock 90s vibe, but also skinny jeans, maxi dresses. Basically everything. (Is that helpful?)
I also prefer to match them with looks that are otherwise somewhat minimalist - clean lines, monochromatic color schemes. A little distressed denim also goes a long way to keeping them from looking too prissy, as would a sleek, minimalist sweater dress. They seem to exceptionally well with bomber jackets and cropped denim jackets.
Here I've paired PUMA X FENTY BY RIHANNA FUR SLIDESwith my beloved Everlane Bomber (coming back for a restock soon after they sold out!) and my DIY denim skirt.
The point is not to overthink it too much - because what makes them to awesome is that they are just comfortable and fun!