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N.Rich tag is a short Javascript code snippet that can be installed using any tag manager (such as Google Tag manager Manager or Adobe Tag manager).
If your website requires consent from end-users before loading tags, you need to use two N.Rich tags; a cookieless tag, which does not set cookies and a standard tag, which uses cookies and enables richer analytics compared to cookieless tag. Cookieless tag should always be used if end-user consent is required, because without this you will likely lose a lot of valuable analytics data, for example, any data from UTM tags.
See guideline to setting up the N.Rich tag
Google trademark permissions
N.Rich Cross-Channel ads use Google as a distribution channel. If your organization as a trademark owner has requested Google to prevent unauthorized parties from using your trademarks on their ads, you need to provide N.Rich permission to use them. If this is not done, your ads that include your trademark(s) can’t run and this will negatively impact ABM campaign performance. Granting permission is a manual process using a form Google has provided and it typically takes between 1 to 2 weeks to get the approval.
See the guideline about granting trademark use access to N.Rich