The following example adds a promotional image to the category page during the campaign. You can also do the same for a product page or CMS page.
On the Admin sidebar, go to Catalog > Categories.
Locate the category that you want to use in the campaign and open it in edit mode.
Click Schedule New Update.
Select Assign to Existing Campaign.
In the list, select the campaign to be modified.
Expand Content.
For Category Image, click Upload and select the image to be displayed on the category page during the campaign.
When complete, click Save.
On the Admin sidebar, go to Content > Content Staging > Dashboard.
Find the campaign in the displayed list or timeline and open it to access the details:
Expand Categories to view the list of assigned categories.
To review the pages for the category when the campaign is active, return to the dashboard, click the campaign again, and then click Preview.