Where can I find this app or function? Facebook SHOP now button

I never seen this before and this looks AMAZING. How exactly do i get this type of shop under my photos?

https://i.gyazo.com/3963fcc6aefefe326fdaa1ed3aa71539.png (not sure how to post links)

but if that doesn't work search on /FuckJerry-684233818337530/

and post it here please?

http://www.youbrandinc.com/social-media/how-to-create-a-store-on-facebook/
maybe this will help you.