There's an Etsy blog post where they explain what a B Corp is and why they wanted to be certified as one [1]. "It’s like a LEED or Fair Trade certification, but for a business, not just a building or a bag of coffee."

[1] https://blog.etsy.com/news/2012/etsy-joins-the-b-corporation...

You can find their Overall B Score at:

https://www.bcorporation.net/community/etsy