It's an awesome tool (and app)!
I'm new to Etsy and I was on StumbleUpon before opening my shop. The entire idea of the app is that it will bring up stuff that it thinks you will like every time you click "Stumble." The more you use it and the more you rate pages the better and more specific the stuff becomes. That's how it works.
For Etsy (and what I did) it's a little tougher and takes more work. While you can put the button on your pages to get random “likes” you can also start using the tool and "like" your own pages. This way others with similar interests will "Stumble" into your shop. To do this, I was using the app one day and it linked to a random Etsy store, once there I was able to search for my shop and start liking my items/pages. Now if someone with similar interests it using the app they might (and have) Stumble into my shop. I’ve been using it for about a week and have around 45 views from it for free form people that may have never heard of Etsy.
That’s it in a nut shell, but if you have more questions let me know or reply to this post and I’ll try to help.
Cheers,
- Jake C.