When your supporters complete an action using a campaign tool synced with NationBuilder, the submission will automatically be populated with a NewMode tag as a Constant Value field. You can see, edit, and add additional tags to submissions by following the link to Edit NationBuilder API on your CRM Integrations page under Advanced settings:
On the API page, you'll see the automatically created tag, and you can edit or add the tags being associated with your supporters actions by editing the Constant Value field:
Remember to separate multiple tags using commas! These tags will appear on your supporter's NationBuilder profile.
Hit the friendly blue Save & Next button and you're all done!