Abigail, to see all of the treasuries, click on the big "etsy" square on the upper left corner of your screen, then scroll down to where it says "more ways to shop", and then click on "treasuries".
A lot of people browse through treasuries just for amusement, like window shopping....so ti tends to create fewer actual sales than when customers are searching for a specific item that they "need"...but it can lead to buyers purchasing things that they realize they "want". It's also incredibly inspiring to see what people create, or curate.