•Google Tag Assistant Chrome Extension
At some point a tag that you have created in Google Tag Manager will either not fire or not send the correct data through to its intended service. There are a number of tools that you can use to troubleshoot your tags.
Generally, tags will not fire correctly because there is either a syntax error in your trigger or variable. These tools will help you understand what tags are firing or not firing and whether the variables providing the data are correctly configured.
Debug Mode
When you preview a container version you can choose to preview with debug mode enabled. In debug mode, Google Tag Manager will let you know what tags fired on the pages and which tags failed to fire. You can access some information about the tag and the state of variables at the time that the tag fired through debug mode. Use debug mode to ensure that your tags are firing correctly. Debug mode puts only your browser session in debug mode so it is a good way of previewing a tag before it is made live. You can also share a debug link with a third party if you want to give someone else access to the draft version of the container.
Google Tag Assistant Chrome Extension
This Chrome extension can be used to understand what Google tags are firing on the page and the data that is being passed to the Google services. Remember that only Google tags are reported on by this service, it will not report on a non-Google tag.
WASP Chrome Extension
The WASP chrome extension is a very powerful tool for monitoring all the tags that are firing on the page and what data is being provided to the service. This tool is especially useful if you do not have access to the third-party that you are sending data to. For example, you may have been asked to set up a conversion tag for a third-party marketing agency and you do not have access to their dashboard to understand whether data is being received by that service. With WASP you can check that the tag is being fired and see the actual data that is being provided to the service. This is a useful check to ensure that the correct data is being passed to the service.
