Facebook is try out letting you pay for ecommerce purchases from other businesses without leaving its site or app. For now it won’t be charging the few small and medium-sized businesses in the US to test this new Buy button on their News Feed Pages posts and ads. When I asked if Facebook would be charging businesses for the feature eventually, it said “it was not disqualifying that option” in the future. Rather than clicking away to a merchant’s site, the Buy button lets you complete the entire purchase flow within Facebook, which could boost conversion rates and endear retailers to the social network. You can use a credit card you have on file with Facebook, enter new payment details and save them for future use, or just checkout and not store your payment info. The feature is privacy safe, and Facebook won’t pass payment details on to other advertisers.