TIME TILL SNAPSHOT: 0:00:00
It's a canvas where everyone can draw on online in real time, that saves itself every few hours after someone touches the canvas. (yes, you should never leave the canvas empty as in hurts my feelings). You can see when that time is by going to the Board tab and searching for TIME TILL SNAPSHOT. In the snapshot section you can see previous drawings. Have fun!
This is where historic moments are saved... by historic I mean when the snapshot clock runs out...