Data-driven attribution vs last click

Key takeaways

• A correct GA4 configuration is the foundation of trustworthy data - without it, every decision carries an error.
• The "Attribution" area needs regular verification, because changes to the site and tags easily break measurement.
• An audit of 62 checkpoints across 10 areas surfaces issues in order of their impact on your data.

Why it matters

Most teams make decisions based on reports no one has verified beforehand. If there's a configuration error at the source, every subsequent chart and every campaign optimization inherits that error. Before you trust the numbers, it's worth checking whether they tell the truth at all.

Data is worth only as much as the trust you can place in it. An audit turns "it probably works" into certainty.

What to watch out for

In the context of the "Attribution" topic, a few things that are easy to overlook usually make the difference:

• Inconsistent data can inflate or deflate results by dozens of percent.
• Errors accumulate in attribution, conversions and client reports.
• The later you spot a problem, the more decisions are built on flawed data.

How to check this in GA4audit

Instead of manually clicking through dozens of settings, GA4audit goes through 62 checkpoints across 10 areas and shows what needs attention - in order of impact on data quality.

1. Connect Google Analytics 4 in read-only mode.
2. Run the audit - the scan takes a few seconds.
3. Go through the prioritized action plan and tick off the points you've fixed.

Most common mistakes

• Duplicated GA4 tags double-counting traffic and events.
• Missing internal-traffic filter, which inflates sessions and conversions.
• Conversions marked without coverage in real on-site events.

Summary

A correct configuration is the foundation on which every analysis rests. A regular audit keeps reports credible and decisions based on data you can actually trust.