Why did Google Analytics stop collecting data?
The Google Analytics help pages give 5 common reasons. The first to rule out: The tag that sends visits to Google Analytics is missing from your site, often after a site, theme or app change.
What causes it?
The tag that sends visits to Google Analytics is missing from your site, often after a site, theme or app change.
In the Google Analytics help:
Your Google tag is not installed on your website
[GA4] Troubleshoot tag setup on your website, read 2026-11-12.Pages that lost the tag, or never had it, send no data at all.
In the Google Analytics help:
Google Analytics only collects data from your website pages that include the snippet.
[GA4] Troubleshoot tag setup on your website, read 2026-11-12.If the ID in your site's tag doesn't match the one in your Google Analytics property, the data goes somewhere else or nowhere.
In the Google Analytics help:
The Measurement ID in the Stream details section must be the same ID in your Google tag:
[GA4] Troubleshoot tag setup on your website, read 2026-11-12.If your tag was set up in Google Tag Manager but never published, visitors never get it.
In the Google Analytics help:
After you configure the GA4 Configuration tag, make sure to publish your changes by clicking Submit in Tag Manager.
[GA4] Troubleshoot tag setup on your website, read 2026-11-12.When a tag that used to work stops being seen for two days, your numbers fall to zero.
In the Google Analytics help:
For example, if the Google tag was previously detected but hasn't been detected in the last 48 hours, causing data to drop to zero, an urgent status will be triggered.
Troubleshoot tag issues with Tag Diagnostics, read 2026-11-12.
How do I check it myself?
Open your site, click around, then check the Realtime report in Google Analytics a minute later to see if your visit shows up.
In the Google Analytics help:
Try clicking around on the website and then wait about a minute to see if those clicks populate in the Realtime report.
[GA4] Troubleshoot tag setup on your website, read 2026-11-12.Open Admin, then Data Streams, pick your website stream, and compare the Measurement ID there with the one in your site's tag.
In the Google Analytics help:
In the Stream details section, copy the Measurement ID.
[GA4] Troubleshoot tag setup on your website, read 2026-11-12.Open your Google tag settings and select View diagnostics under Tag quality to see if Google flags a stopped or missing tag.
In the Google Analytics help:
Under “Your Google tag,” in the “Tag quality” section, select View diagnostics.
Troubleshoot tag issues with Tag Diagnostics, read 2026-11-12.
How would I know the day it starts?
- Feder reads your page views and sessions from Google Analytics each day and compares each day with your own history.
- If they go quiet or fall outside your usual range, Feder tells you, after Google's own processing time has passed.
Some numbers are too quiet to judge daily, such as a form filled in a few times a week. Until there is enough of your own history to judge a change, Feder says it is still learning and scores nothing, rather than guessing.
See what Feder reads from Google Analytics, which feeds Visits. Feder only reads. It never changes anything in Google Analytics.
What else goes wrong with these numbers?
- Why aren't my key events showing in Google Analytics?Google Analytics
- Why does Google Analytics show (not set)?Google Analytics
- Why is yesterday's data missing in Google Analytics?Google Analytics
- Why is my Google Analytics traffic Unassigned?Google Analytics
- Why doesn't my Accelo invoice total match what I expected?Accelo
See every question.
Where do these answers come from?
Every cause and check on this page comes from the Google Analytics help pages, quoted above with the date we read them. Last reviewed 2026-11-12. We read them again by 2027-11-12. If one changes, this page changes or comes down.