Social network Pinterest has purchased a startup that powers a machine-learning recommendation engine. The seven-person company Kosei, which was founded less than a year ago, has developed a graph that understands the relationships between millions of products. Image-driven Pinterest can use this recommendation engine to help detect spam, recommend more relevant pins, and target its advertising. Pinterest just rolled out advertising on its platform earlier this month. Continue reading Pinterest Acquires Kosei to Help Improve Pin Recommendations

Instagram has redesigned its “Explore” tab to provide a more relevant experience for users, rather than showcase random pictures that receive a lot of global Likes. The Explore tab will now display the photos and videos “Liked” by individuals that a user is actively following. This personalization reflects Instagram’s focus on each user’s social graph, which contrasts with the approach by Vine that largely centers on re-sharing content and notable video creators. Continue reading Instagram Improves Explore Tab for Personalized Experience

Biz Stone has an impressive track record with helping launch various social products, including Xanga, Blogger, Twitter and Medium. Stone’s most recent undertaking is Jelly, a question-and-answer app though which users can ask their social media friends — and friends of friends — questions about anything, using text and images. While the app has the potential to change the makeup of Internet searches, some critics have been skeptical of the need for what essentially serves as a mash-up between Quora and Instagram. Continue reading Biz Stone Aims to Revolutionize Social Search with Jelly App