This is a great idea if you plan on continuing to work or need it for reference in the future. As everything is created on the virtual whiteboard it can be saved in your Webex space, so your team always knows where to find it should they need it in the future.
If you started your call through a Webex space your Whiteboard is automatically saved in that space.
If you are not connected to the Webex app, you can also save your whiteboard by creating a new Webex space for it.