Etsy help

Hey everyone, I know a lot of people on here also have etsy.com pages or accounts. I am helping my brother make one (he's a woodworker) and we're having a hard time with the facebook - etsy link, like you can put your etsy on your facebook apparently but its very confusing. If anyone has any experience with this or even etsy in general please let me know and we can hash out specifics. Thanks so much!