You can post custom announcements on your STR Parties. This is a good way to keep your customers engaged by offering giveaways, discounts, or whatever other information you'd like to convey during a Party.

Here's a screenshot of it in action:

Go to your Parties page.  Click on the Party to which you would like to add an announcement.  In the top left corner, above the Party name, you will see the clickable words, Edit Party Announcement.  Click here. A bubble will pop up that will allow you to type your Party announcement.  Be sure to click Save! Your Party Announcement will then appear as a banner at the top of the Party when customers click the link to view your Party.