The basics of the Jamboard are just like a whiteboard. You walk up to it, pick up a pen, and start writing. But that’s where the similarities stop. The Jamboard is really a 55-inch 4K screen. And it isn’t just for one person to work on — everything written on one Jamboard can be mirrored across dozens of other Jamboards, as well as computer and tablet screens. The people on the other side of those devices can work on the very same board, too.
https://www.theverge.com/2017/5/23/15680250/google-jamboard-digital-whiteboard-hands-on-video