If you want a single message to display on one screen, this can be done with a message promotion.
Step 1. From your dashboard head to your promotions section.
Step 2. On the top left hand side of the screen click on New Promotion enter a promotion name then Get Started.
Step 3. Choose desktop of mobile. You will be able to duplicate this later on for whichever option you choose.
Step 4. Choose a display type. This will be how to promotion is displayed on the screen.
Step 5. Select goal for the promotion: Website Messaging
Step 6. Choose a template, you can always fully customize this in the design canvas later on!
Step 7. Choose your basic audience. For advanced segmentation please skip this step and set up advanced audience later
Step 8. In the final step you can edit basic text, coupons and images. For full customization choose the Design Canvas option!
You are all set with your Single message popup.