Reporting
Why Advertising Metrics Can Be Misleading
By Adedon · Updated 2026-08-14
Why can advertising metrics be misleading?
Advertising metrics mislead when the conversion is the wrong event, the sample is too small, attribution credits the last easy click, averages hide mix shifts (brand vs non-brand, prospecting vs retargeting), or the screenshot omits spend and quality. Metrics are not liars by themselves. Reports that treat a noisy ratio as a decision are. The fix is definitions, thresholds, and labeled inference — not more decimals.
Wrong denominator, confident numerator
Optimizing to ‘leads’ that include spam makes every efficiency metric look like a success story. Fix the event before you trust the ratio.
Small numbers, big percentages
Two conversions to one is a 50% drop and also a coin flip. Require volume or time before you narrate a trend. This is the most common founder panic.
Mix shifts
If brand share rose, blended CPA fell without non-brand improving. Averages hide that. Segment the jobs.
Screenshot culture
A ROAS tile without date range, conversion definition, or spend is marketing folklore. Adedon will not send those as a report. If a number cannot survive a footnote, it should not drive a budget change.
Goodhart’s law in Ads Manager
When CTR becomes the target, ads become clickbait. When ROAS becomes the target, systems harvest existing customers. Choose targets that still resemble the business.
Frequently asked questions
If metrics mislead, why report them?+−
Because operations need them. The discipline is in how they are framed, not in going metric-free.
Should I ignore view-through conversions?+−
Do not ignore them; do not treat them as cash. Put them in a labeled column.
What’s the fastest honesty upgrade?+−
Name the conversion in every CPA sentence, split brand, and add a quality line from sales. Do that this week.
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