AI Deployment
[Marketing Index.]  ·  Desk 05  ·  SEO Intelligence

The index moved.
Position did not follow.

Original research on organic search and its successors - what a crawler receives, what an answer engine cites, what the courts have compelled and what is still undefined. Eleven features in this edition. How we did it, the data behind it and what it does not prove.

The desk's position

A court ordered the index shared. Two-fifths of top sites withdrew from it. Position kept being measured as if nothing had changed.

On 3 March 2026 a court-ordered regime requiring Google to share its search index with qualified competitors took effect. The licence terms that would let anyone use it do not yet exist. In the same period, 40.9% of the top thousand sites blocked at least one AI crawler and 82.4% of news sites restricted access. The open web is closing selectively - and the discipline built to compete inside it has not been rewritten.

Rankings still get reported. Citations still get counted. What decides whether a brand is retrieved at all - presence in the index, presence in the crawl, presence in the licensing terms of the engines that answer without linking - is measured almost nowhere. This desk works from the crawler receipt backwards, and states what each measurement can and cannot support.

SEO optimised for position inside a shared index. What decides outcomes now is presence in that index, and presence itself is what most sites just gave up.

We publish what we find, including where sources disagree. Every feature states its method, its evidence base and what it cannot establish.

SE
The practice behind this desk

SEO Legendary

The operators who produce this research also run SEO as a service - technical SEO, entity clarity, content systems and citation evidence. We check what a crawler actually receives before we discuss rankings, because the two are not the same document.

Features

Edition Q1 2026  ·  11 features in this desk
Feature 27  ·  SEO Intelligence

A remedy took effect with no rules attached

On 3 March 2026 a court-ordered regime requiring Google to share its search index with competitors took effect. The licence terms that would let anyone use it do not yet exist.

Read the feature →
SEO Intelligence
3 Mar 2026
the remedy took effect. The terms did not.
Feature 27
Bar chart showing 40.9 per cent of the top 1,000 websites are unreadable to GPTBot, and 82.4 per cent of news sites with a robots.txt restrict at least one AI crawler.
Feature 28

Two-fifths of top sites now block AI crawlers

A July 2026 study found 40.9% of the top 1,000 websites unreadable to GPTBot, and 82.4% of news sites restricting at least one AI crawler. The open web is closing selectively.

Single stacked bar showing Google holding 89.87 per cent of conventional search engine market share and all other engines holding 10.13 per cent.
Feature 29

Google's share is intact. Its growth rate is not.

Google holds 89.87% of conventional search and sends 87.6% of referrals. Perplexity grew users 370% and passed Gemini on referral share. Share and growth are telling different stories.

SEO Intelligence
0
of the inputs, owned by the team held to the outcome
Feature 31
Feature 31

Accountable for what they do not own.

An SEO function is held to organic visibility while controlling almost none of the inputs that now produce it. The accountability did not move when the levers did.

Four-value panel: 28 DOM nodes served, 0 words, 0 headings, 0 links.
Feature 30

We audited a site that served no content

We audited a live site and found every page serving a body containing one element: an iframe pointing at itself. A crawler received 28 DOM nodes where 3,000 words should have been.

Bar chart: 40.9% of top sites blocking GPTBot, 82.4% of news sites restricting at least one AI crawler, 38% of AI Overview citations from the top ten results.
Feature 32

The index was always the asset.

A court ordered the index shared. Two-fifths of top sites withdrew from it. One site we audited was never in it. SEO optimised position; what decides outcomes now is presence.

Grouped bar chart: paid click-through rate with and without an AI Overview present.
Feature 05

Paid search grew while search shrank

An answer layer sits between the query and the result. Paid search grew anyway.

Ads Intelligence
Bar chart showing Google traffic to publishers down 33 per cent globally and 38 per cent in the US, organic click-through rate down 61 per cent where an AI Overview appears, and HubSpot organic traffic estimated down 70 to 80 per cent.
Feature 21

A third of the traffic is gone.

Google search traffic to publishers fell 33% globally and 38% in the US in the year to November 2025. The largest single-year change to content distribution since search became the default channel.

Content Intelligence
Bar chart showing the share of AI Overview citations from pages ranking in Google's top ten falling from 76 per cent in prior measurements to 38 per cent in 2026.
Feature 22

Ranking stopped predicting citation

Only 38% of AI Overview citations come from pages ranking in Google's top ten, down from 76%. Ranking and citation have decoupled, and the discipline's instrumentation has not caught up.

Content Intelligence
Stacked bar showing AI citation sources: 84 per cent earned media, roughly 15.7 per cent other, and 0.3 per cent paid or advertorial content.
Feature 23

AI cites earned media and almost never paid

An analysis of 25 million-plus links found 84% of AI citations come from earned media and 0.3% from paid. The dominant new channel has no purchasable entrance.

Content Intelligence
Content Intelligence
20 years
of a metric that stopped tracking anything
Feature 26
Feature 26

The session was never the point.

Five features on this desk describe one failure: the metric that governed content for twenty years stopped tracking anything. Sessions were always a proxy for something else.

Content Intelligence
[Marketing Index.]  ·  Published quarterly

One issue a quarter.
Nothing in between.

Every edition collects the quarter's features and reports across all seven desks into a single issue. No weekly send, no roundups.

[Marketing Index.]Edition Q1 2026

A court ordered the index shared. Two-fifths of top sites withdrew from it. Position kept being measured as if nothing had changed.

A remedy took effect with no rules attached · SEO
Two-fifths of top sites now block AI crawlers · SEO
Google's share is intact. Its growth rate is not. · SEO
Accountable for what they do not own. · SEO