These are smaller printed versions of your slides which can be printed 2, 3, 6 or 9 slides to a page.
They can provide useful backup material for your audience and can also be customised with your company name and logo.
To delete a placeholder just select it and press Delete
You can restore the placeholder by using the Handout Master Layout dialog box
In PowerPoint 2000, you can now print your handouts with 2,3,4,6 or 9 slides per page, horizontally or vertically.