Realtime Board is a free online collaboration tool that allows users to create and share interactive whiteboards, presentations, and documents in real-time. It provides various tools to upload, organize, and annotate files. Short tutorial videos demonstrate how to use features like links, Google Drive integration, and presentation building. A key aspect is the ability to invite others to collaborate simultaneously on boards through visual and video chat. The platform could be useful for student group projects and teacher lesson planning by facilitating remote and classroom cooperation.