Padlet is a digital bulletin board app that allows users to collaboratively share notes, images, videos and links on virtual "walls". It can be used by teachers and students for class discussions, group projects, brainstorming ideas and showcasing student work. The CEO of Padlet is Nitesh Goel, who developed it initially as a school project in 2008 under the name "Wallwisher". Teachers can create Padlets using different templates like walls, canvases or grids, then share the unique Padlet link with students to allow commenting and posting in real-time from anywhere.