This message (in the analytics report or on data-driven checkpoints) means the audited property has no data within the last-30-days window. The possible causes - from benign to action-required:
1. The property is brand new
A newly created property needs time to gather data (reports populate within ~48 h of implementation, and the 30-day window fills gradually). That's normal: configuration checkpoints work right away, behavioral ones after 2-4 weeks of data (how to add GA4).
2. You're auditing the wrong property
An account with many similarly named properties = it's easy to pick the empty test one instead of production. Check in GA4 (the Realtime report / standard reports) whether the selected property actually has traffic - and compare the identifiers (how not to mix them up).
3. Data collection genuinely broke
The most serious variant: the property historically had data but stopped collecting - the tag removed in a deployment, a GTM container rolled back, a consent banner blocking everything. Check recent weeks in GA4: if the charts cut off on a specific day, you have the failure date ("what did we deploy that day?"). Paradoxically - this discovery is one of the most valuable things an audit can give you: run a full audit; the implementation checkpoints will point to the cause.
4. The data stream is disabled or repointed
Admin → Data streams: check that the website stream exists and its measurement ID matches the tag on the site.
What the message means for audit results
Checkpoints requiring 30-day data switch to "N/A" (no data ≠ a configuration error); configuration checkpoints and the site scan work normally. Once data appears, run a rescan - the behavioral results fill in.
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