Now, Facebook has become Instagram's owner. So the business on these two social platforms is closely related. Therefore, you should optimize the advantages of both platforms to achieve higher business efficiency.
As said before, each social media platform will provide different objectives. Facebook is used to connect with many customers while Instagram is used to build brands.
However, to totally understand how to sell on Etsy successfully, you should take advantage of both Facebook and Instagram. It is strongly recommended to integrate Etsy and Facebook to manage your product inventory better.