The ins tag is a new form of tag that works for iframe or JavaScript and has a different format than other tags. The tag provides richer domain information in Verification, giving you greater visibility into where your ads are serving.
Reference:
<ins class=’dcmads’
style=’display:inline-block;width:300px;height:250px’
data-dcm-placement=’N7480.1664088DOUBLECLICK.NETTEST/B8299600.114131924′
data-dcm-rendering-mode=’script’
data-dcm-click-tracker=’${CLICK_URL}’>
<script src=’https://www.googletagservices.com/dcm/dcmads.js’></script>
</ins>