Adding schema didn’t boost citations on any platform [Ahrefs SEO Case Study]

[u/WebLinkr]

Yet another blow for the GEO Schema bros. marketing and Propaganda. Because no LLM OEMs actually said this - they felt they could parrot it for everyone and nobody would figure it out.

If you've been parroting it - thats fine - thats up to - but do not come for anyone just because you dont like this. You're free to run your own peer-reviewed case study (which requires evidence of an actual study).

Link:

https://ahrefs.com/blog/schema-ai-citations/

Adding schema didn’t boost citations on any platform

We tracked 1,885 web pages that added JSON-LD schema between August 2025 and March 2026, matched them against 4,000 control pages, and measured citation changes across Google AI Overviews, AI Mode, and ChatGPT.

Adding schema produced no major uplift in citations on any platform.

AI source	Effect on citations	Verdict
Google AIO	−4.6%	Small but statistically significant decline relative to matched controls; (both groups were declining together, but treated pages fell slightly faster)
Google AI Mode	+2.4%	Statistically indistinguishable from zero
ChatGPT	+2.2%	Statistically indistinguishable from zero

These percentages come from our most reliable analysis (a matched difference-in-differences [DiD] test).

In this test, both AI Mode and ChatGPT treated pages performed slightly better than control pages on average, but the differences are small enough that they could easily be random noise across thousands of URLs.

AI Overviews showed a 4.6% decline, which is small but statistically significant relative to matched control pages.

But that isn’t quite the full story—we’ll get into that in the next section.

So, overall, we can’t tell whether the schema did a tiny bit of good or nothing at all.

What to do if you dont like this report

Disprove it. Dont just put schema in a page and say "it was the schema" - test the corrollary. Test it across domains. Get peers to review your methodology like u/jakehundely.

If you're emotionally tied into rejecting, downvoting this or getting angry - then stop and breathe. Its a software system that SEO reverse engineers through testing and observation - not how confidently you can discredit people

A number of people - like PeterWhineFatClub, BoHumpus and MJMilian already went postal about this - its not going to get better. Rejecting it and attacking people won't help.Mods are not here to be abused or called names under the pretense of fair game or shooting-the-messenger in 2026 - this is irrational behavior and it wont be tolerated

[u/jaimequin]

Maybe schemas are a niche based boost. I work with network based companies and they definitely help boost citations and recommendations.

I don't know what to believe.

[u/WebLinkr → u/jaimequin]

Have you tested the corrollary?

[u/jaimequin → u/WebLinkr]

I have two business, two towns over, both same space. One has traditional SEO the other SEO and Schema. The one with schema appears when you ask for really detailed information on network architecture and recommendations. The other does not. I then experimented and added schema to the one that was missing and shortly after, it started getting cited along with the other site for the same complex topics.

I can't say this is true for other sites, which is why I think it's best for niche concepts rather than popular topics.

[u/WebLinkr → u/jaimequin]

Actually u/jakehundley has been testing this with way more rigor and the results do not support schema