Tag tester (also known as tag review in Fluency) allows you to review and debug individual tags or tag queries for specific accounts on a Blueprint. Use tag tester to ensure tags are providing the right output and troubleshoot errors before launching campaigns.
How to test tags
Via Tag Review
Hover over Automate (rocket icon), and select Tag Tester.
Select an account and Blueprint.
Enter a tag in the Tag to Evaluate field.
(Optional) Add a data filter under Optional Filters.
Click Submit Tags for Debugging.
Via a Blueprint
Hover over Automate (rocket icon), and select Blueprint Editor.
Select a Blueprint, campaign, ad group, or creative.
Click the three dots to the right of any field that contains a tag and click Open in Tag Tester.
The tag tester will open on the right, automatically populating the account and tag for testing.
(Optional) Include a data filter for a specific tag preview.
Click Submit Tags for Debugging.
Reviewing tag tester results
After testing your tags, you will receive results in two dropdowns:
Generation Trace:
Inputs: Contains all the content within the tag.
Outputs: The result of the content within the tag and its function(s) for the given account and Blueprint. Each tag output will have its own respective line.
Final Output: The final tag result based on the inputted tag or tag query.
Resolving tag tester errors
If tag tester comes back with errors or displays ##UNDEF##, follow this guide to resolve the issues:
Understanding the "##UNDEF##" output: The ##UNDEF## output indicates that the tag inputs are not matching the tag. Review the tag that is generating the error.
Potential sources of errors:
Data source discrepancies: Check for inconsistencies in the data source, such as the account ingestion sheet.
Missing information: Ensure that the selected account for testing the tag has all the necessary information associated with the tag. It could be as simple as an edited input in the source or missing data from the desired tag.