I really like how easy it is to exclude the listings that I don't wish to view or favorite. And then view or favorite those listings I chose to do at a click of a button! Super easy to do on my Android phone too! And it's free! I can launch an item in my shop as long as I have the appropriate amount of credits.
I liked the fact that I could promote my items on my social networks while being able to take time off at the same time. I didn't have to be online to promote. Anything to save time is a blessing for my business!
I use Seller Tools to tweet my Etsy products. I love the automated feature meaning I just had to set it up once and leave it to tweet automatically for me. I liked that I could choose my main product photo for my tweets and the frequency of tweets. I have noticed increased views on my Etsy shop directly from the Seller Tools auto tweets!