relevancy is etsy's form of search engine optimization
I'll help you with one listing to help you get an idea
http://www.etsy.com/listing/95225901/pink-tagsTitle:20 Gift tags Pink and Lavender Hang Tags
tags:
your tags look mostly good, but get rid of "gift" by itself as a tag, and have it as the third part of the category -- gift isn't allowed as a tag on it's own
also get rid of "pink" by itself
and add
"pink and purple tags"
"pink gift tags"
"purple hang tags"
and that should do it for that listing