To use the Interactive Banner module, you'll need to add your chosen banners and then add the interactive buttons to the banners.
First, navigate to System > Design > Banners in your OpenCart admin area and choose a banner to edit. If you're adding a new image to the banner, add the banner and then click the "Save & Continue for Interactive" button. The Interactive button will then appear for the new images.
Next, click the Interactive button, drag the tooltip to the desired area on the image and add a product to the text field using the autocomplete functionality.
Alter the tooltip or background colour using the tools provided in the left hand corner then save them banner when you're finished.
Finally, add the banner to the site as you would with a normal banner.