F-commerce refers to selling products or services on or through Facebook. There are two main types of F-commerce: 1) Facebook-facilitated on-site selling, where brands use social plugins like the Like button on their own websites to encourage purchases, and 2) Facebook-initiated selling, where businesses create storefronts directly on their Facebook pages to display and sell products. While storefronts provide more visibility, they often require users to leave Facebook to complete purchases. Large brands like Lady Gaga can get away with this, but others provide a more seamless experience by keeping users on Facebook through the checkout process.