In my opinion, Keywords are the easiest way to get new customers on Etsy. Because buyers go there when they are ready to purchase something, Keywords are the first gateway to allow those customers to find you quickly.
But in 2017, there is now more competition than ever on Etsy.
So instead of going after the big, general keywords, you should be focusing on your own niche. There are thousands of shops that sell jewelry, printable art, and other big categories. But that doesn't mean you can't go after those markets. It just means you need to find your own sub-niche space and stand out.
The best way to do this is to research niche keyword ideas. Essentially, you want to follow a process like this:
1) Research Keyword Phrases
Think of two, three, and four-word keyword phrases that give you only around 500 to 5,000 product Results once you type them into Etsy. Make sure this phrase shows up as a suggested "keyword phrase" by Etsy. The keyword will dropdown automatically from the search bar. This way, you know there is at least a decent amount of traffic coming from that keyword. If it doesn't drop down, then there is likely a very low search volume from that keyword.
2) Determine which Keywords make the best Products
Next, decide if you can easily make a product based on that keyword. If the idea is going to take too much time and money to create, then drop it. But if you can easily knock out the idea within a day and it's not going to cost you much money, then it's likely worth pursuing. A good rule of thumb is to make something that you can re-sell for 10-times more that the materials you made it out of. So if it costs you $10 USD in materials, you should be able to re-sell it for $100 USD on Etsy. Time is important, too. You want this to be something you can make in only 1 or 2 hours of time.
3) Get those new products up on Etsy ASAP
Finally, get the product up on Etsy asap. If it takes you more than 1 or 2 days to get the item up on Etsy, then you may need to simplify your design process to something more realistic. Simplify your steps, come up with an idea that you can more easily achieve, and move forward with. The goal here is to get used to the creative process by turning out designs as quickly as possible. Then, get used to coming up with new product ideas. The more ideas and keywords you can find, the more stability you can have on Etsy.
To help you follow this process, I put together a printable PDF that you can use to write out your Keyword Ideas, and then re-write the ideas that seem the most realistic.