Pinterest is a social bookmarking tool that allows users to save and share images and videos from websites by "pinning" them to digital boards. The article discusses how Pinterest could be used as an informal learning tool in online courses. For example, instructors could ask students to locate course-related content online and pin it to a class board to increase sharing of information. Practitioners may also find Pinterest useful for activities like researching products and services. While originally used mostly for personal interests, Pinterest's professional uses are growing due to the ease of curating and collaborating on web content through digital boards.