Just a couple suggestions.....
For your titles, try putting exactly what the item is as the first few words.
For instance....if it's a necklace, use that for your first word.
If it's a painting, use that for your first word.
Keep going down the list of importance.
Also, your shop announcement, I believe it is part of search criteria....I'm under the impression the first several words should be descriptive of what you sell, so you might want to rearrange that.
Try using more 2 and 3 word tags. That will get you popping up in search more.