A Passback Tag is executed in the event of a "no fill" programmatic request. It's recommended to have a backfill solution in place for tag-based programmatic integrations to maximize earnings and safeguard against blanks/white-space when an ad is not returned. A passback is not necessary for bidder integrations (i.e. Prebid).
1. Select Edit Placement from your Placement detail view.
2. Scroll to bottom of placement edit view, insert your Passback Tag in the <textarea>.
3. Click Save
<script>tags should not be nested inside other tags
<script>tags should only have either a
srcattribute or inline code (i.e. content within the opening and closing tags), but not both