1. Create it
Name a campaign at Advertiser. You get an id. That id is the embed.

Ad Demo 1
Primary EE network scroll
Go to ads.reversal.org. Create a campaign, sell access to an ad slot, manage which banners stay live, and embed that campaign on any page.
Name a campaign at Advertiser. You get an id. That id is the embed.
A paid slot stays in the campaign until the term ends. You choose which banners stay live.
Paste one script. The script URL stays put. Only the campaign id changes.
Campaign eebanner0001 scrolls every banner that is still live. Your campaign uses the same script.
<div class="ee-slot"
data-campaign="your-id"
data-source="your-site"
data-slot="sidebar-top"></div>
<script src="https://ads.reversal.org/embed.js"></script>