From the archive. First published in December 2016. Rewritten for clarity, with a note on what happened afterwards.
In 2016 Facebook disclosed a series of measurement errors in its own reporting. It had overstated average video view time, and then found further discrepancies, the most consequential being that Page Insights had been overcounting how many people saw organic posts.
In other words, the reach figures page owners had been using to value their work, sell advertising and price pages were inflated by Facebook’s own accounting.
Why this still matters
Not as a grievance, but as a habit. Platform reported metrics are estimates produced by the party that benefits from them looking good. That does not make them useless. It means you should treat them as indicative rather than audited, and check them against something independent where you can.
Meta still labels reach as an estimated metric in its own documentation. Independent benchmark studies regularly disagree with each other by wide margins, and sometimes with themselves.
The reporting quirk worth knowing about
There is a specific artefact that trips up almost everyone comparing organic to paid. Once someone is reached by an advertisement, Facebook removes them from the organic count and records them as paid. So boosting a post makes its organic reach look worse than it actually was. A controlled test of this found expected organic of two and paid of one being reported as organic one and paid one.
This is almost certainly the origin of the widespread belief that running advertisements suppresses your organic reach. We could find no credible study supporting that claim. The reporting artefact explains the observation without any suppression being involved.
What to do when valuing a page
- Ask for screenshots across a date range rather than a single good week.
- Compare engagement against reach rather than against followers, since reach is the live number.
- Check whether posts in the period were boosted, because that changes what the organic figure means.
- Read the comments. Real audiences are messy and specific in ways no dashboard can fake.
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