Here's something else, I include in my tags.
Each of my items has a distinct file number, so that I can match them up to their file on my computer. I include that number in tags.
The reason? I get many convos from customers who want to know, for example, which of my leotards I would recommend for a 6 year old child.
When this happens, I send them a list of file numbers, so they can browse the available leotards.
The second thing I include in the tags is the Etsy listing number.
Sometimes people ask, "I saw a leotard in an adult size" (implied: but I'm too lazy or time-constrained, to look through your whole store.) "Can you tell me if you have it in an child's size?"
In this case I give them the Etsy listing number, so they can use it in Search to find the child sized leotard.
