Double Screen posibility

When you're sharing the screen you can not only show the whole screen but also share window from the particular app or even a tab from your browser. When you will share just your tab or app window you can "split" what you're showing to the audience. So you can be sure participants won't see everything you have on your desktop ;) This is an especially good solution if presenter is using two monitors. (In fact, this is recommended in such cases).