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Stop Wasting Time on GA4/GTM’s ‘Tag Coverage’ Report – Use this tool to tag 100% of your page without fail.

When you log in to GTM, you might see this alert:

“Container quality: Needs Attention. Some issues are detected that may need your attention.”

container quality needs attention ga4 gtm

Click on ‘View 1 issue‘ (or something similar) to see what’s going on.

view issue gtm

You will now see the following message:

“Some of your pages are not tagged. Having your tag installed on all pages of your site is important for comprehensive measurement. Untagged pages may result in gaps in data and lower quality measurement.”

some of your pages are not tagged gtm ga4

Click on ‘See untagged pages‘ to view the list of pages Google claims are untagged.

See untagged pages

You will see a Tag Coverage Summary report with these four tabs:

  • Included pages
  • Not tagged
  • No recent activity
  • Tagged
Tag Coverage Summary report gtm

The hidden issue with Tag Coverage Report.

The Tag Coverage Summary report is not 100% reliable.

It can produce:

>> False positives (It says a page isn’t tagged, but it actually is).>> False negatives (It says a page is tagged, but it is actually not).

It may even suggest tagging irrelevant pages, like:

>> Pages with dynamic URLs.>> Non-content pages.>> Other irrelevant pages that don’t need tagging.

Use this report as a general guide – NOT a definitive source of truth.

The smarter solution (How I do it).

To be 100% certain that pages are tagged, I use Screaming Frog SEO Spider.

Here’s why it works better than GTM’s Tag Coverage Report:

>> Scan the entire site (even large sites with 10,000+ pages).>> No false positives/false negatives (unlike GTM’s report).>> Detect every missing tag at scale.

How I use Screaming Frog for tag auditing.

  1. Use the Custom Search feature in Screaming Frog.
  2. Scan the entire website’s source code.
  3. Look for specific tags on every page site-wide.

This approach works better than other auditing tools like:

Why? Because it’s faster, more reliable, and works for large websites.

For step by step instructions, check out this article: Some of your pages are not tagged in GTM/GA4 [Fixed].

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