Page Meta Descriptions

The Page Meta Description feature — found by clicking the “Option” button on any content page — will place a tag on the head section of XHTML pages you export through Jumpchart and also on your public previews.

In case you’re not familiar with this kind of tag, its goal is to provide a basic and brief explanation of the page’s content so people can find you more easily through search engines — it’s the text that Google shows right under the page title.

You can find more about it on Wikipedia.