@TheBloomingThread - I'm just guessing, but I would think it's better to be targeted with your keywords, otherwise you're wasting impressions on people who aren't actually interested.
You might want to check out google's keyword tool to see what people are actually searching for and see what fits best with your items. Search ads would be a great way to get more Etsy views with the more competitive terms, so that's where I would focus my efforts.
Here's the tool:
https://adwords.google.com/o/Targeting/Explorer?__u=1000000000&__c=1000000000&ideaRequestType=KEYWOR... For example, if I want my silver hoop earrings to be seen, rather than wasting impressions on general words like "jewelry" or "casual" I would cut right to the chase and use the highly searched for (but highly competitive) term "silver hoop earrings". It's accurate, targeted, and should get me lots of views for the impressions.