When people shop online, they want to feel secure in their purchase so they buy from professional-looking sites. If your shop does not look the part, it may be hurting your sales. What you need to do to improve your look:
Have a Logo
Brand your shop by having your banner, avatar (profile photo), and business cards all look the same. They don't need to be fancy, just consistent. If you don't know how to design your own brand, ask another team member for help. We have many talented designers!
Fill out the policy page of your shop. Customers like to know what to expect with returns and refunds, turn-around times, custom orders, etc.
Edit Your Writing
Have someone look over your listing descriptions for spelling and punctuation errors and missing or inconsistent information.
What bothers me the most as a customer is sellers not responding to my emails quickly. That tells me they are forgetful or too busy with something else. Even if your shop is only a part-time gig, don't let it show! A simple reply of "Got your email. Can't reply now but I will by tomorrow evening" is better than a late response or none at all. This tip also applies to shipping notifications. I like to know the seller is aware of my purchase and is working on it or shipping it off.
What Doesn't Matter
Many of the people who buy from Etsy are not too familiar with the site, which means when they search for an item, they usually go straight to the listing and check out from there. They probably will not see how many sales you have. Nor care. They may, however, try to find your feedback to make sure you are reliable. So don't worry if you have low sales. Just make sure you do all you can to be professional and earn great feedback! (Also keep in mind that since many people don't see your shop page, include important information such as current processing time in each listing or include a link to your policies.)