Google's own numbers: structured data lifted CTR 25-82%

Two numbers get quoted constantly in structured data pitches: Rotten Tomatoes at 25% higher click-through rate, Nestle at 82%. Both come from Google itself, not from a third party summarizing Google. Here is exactly where they live, what Google does and does not disclose about them, and why citing Google’s own greatest hits is not the same as citing a representative study.

What Google’s page says#

Four companies, one list. Google’s structured data documentation states plainly: “Rotten Tomatoes added structured data to 100,000 unique pages and measured a 25% higher click-through rate” for the enhanced pages versus pages without structured data. The same paragraph adds that “Nestle has measured pages that show as rich results in search have an 82% higher click-through rate than non-rich result pages,” and that “the Food Network has converted 80% of their pages to enable search features, and has seen a 35% increase in visits.” All three figures sit on the same Google Search Central page, in a list that also carries a fourth entry, Rakuten’s time-on-page result, which this piece does not cover. They are not on dedicated case-study pages like those in Google’s separate case-studies index.

No dates, no markup type, no sample window. Google names the outcome and, for Rotten Tomatoes, the page count, and stops there. There is no disclosed year, no named schema type (movie, review, recipe or otherwise), no control methodology and no confidence interval for any of the three figures. A reader can verify that Google states the number; a reader cannot verify how Google’s partners arrived at it.

Why this is not typical#

These are Google’s own selected success stories. Google chose to publish these few examples out of every site that has ever added structured data. That is survivorship bias by construction: sites with a flat or negative result after adding markup have no reason to appear on a vendor’s own promotional page, and Google has no obligation to publish them if they did. A 25% or 82% lift is real for the site that reported it, but nothing here says it is the median, the average, or even a common outcome.

Different markup, different rich result, different starting point. Rotten Tomatoes’ figure plausibly comes from review or aggregate rating markup surfacing star ratings in search; Nestle’s figure is framed around whatever specific rich result Nestle’s recipe or product pages earn. A site adding FAQ markup to thin pages, or organization markup to a homepage, is not adding the same thing these companies added, and should not expect the same multiplier.

Why we care#

Cite the source, not the number in isolation. “Structured data increases CTR by up to 82%, according to Google” is defensible; “structured data increases CTR by 82%” is not, because it drops the fact that Nestle’s figure describes Nestle’s rich results, not a universal constant. Link to Google’s own page when quoting either figure, since that is the only place either number is verifiable.

Treat the lack of methodology as a limit on the claim, not a reason to ignore it. Google publishing these figures at all is meaningful: it is Google’s own documentation, not a marketing blog’s paraphrase. But a case study built for a doc page is not a substitute for measuring your own before-and-after click-through rate once you ship structured data on your own site.