June 2026 has delivered a sharp reality check for anyone treating generative engine optimisation as a bolt-on task. Google has finished rolling out its latest spam update, new research exposes a 62% “ghost citation” rate across major AI engines, and a separate study confirms that ChatGPT’s reasoning modes behave like entirely different search systems. Our team has spent the past fortnight stress-testing client sites against every one of these developments. Here is what matters right now.

Key Takeaways

• Google’s June 2026 spam update has fully rolled out, and sites relying on manipulative link schemes or thin content face renewed risk.
• 62% of AI citations across ChatGPT, Gemini, and Google AI Mode fail to produce an actual brand mention — so-called “ghost citations.”
• Only 25% of cited sources overlap between ChatGPT’s Thinking mode and Instant mode, meaning a single AI visibility strategy is insufficient.
• Technical SEO checklists now need to account for AI systems that use the same crawl index to ground their answers.
• Enterprise-scale teams require fundamentally different tooling from standard SEO platforms to manage visibility across both traditional and AI Search.

Google’s June 2026 Spam Update Is Live — Audit Your Link Profile Now

The rollout is done. As confirmed in Semrush’s coverage of Google’s June 2026 spam update completion, the update targets link spam, cloaking, and auto-generated low-quality content. It does not target sites penalised by previous helpful content updates, so those are separate issues.

Our immediate action for every client: a full backlink audit, disavow file review, and content quality pass on any pages flagged in Search Console. If your rankings shifted between 10 and 18 June, the spam update is the first suspect. Check manual action reports. Check indexing anomalies. Do it today.

Ghost Citations: 62% of AI References Never Name Your Brand

This is the single most underreported problem in AI visibility. A joint study by Semrush and Kevin Indig analysed 3,981 domain appearances across ChatGPT, Gemini, Google AI Overviews, and Google AI Mode. The finding, detailed in the ghost citations study, is blunt: AI engines routinely cite a URL without ever mentioning the brand behind it.

• Your page gets linked. Your brand name doesn’t appear in the answer.
• Users see a footnote, not a recommendation.
• Traffic may trickle in, but brand recall stays at zero.

We are now advising clients to embed brand names, product names, and entity-level markup directly into the content AI engines are most likely to cite. Structured data, consistent naming conventions, and prominent brand mentions in opening paragraphs all help close this gap.

ChatGPT’s Two Modes Cite Different Sources — Optimise for Both

Treating ChatGPT as a monolithic system is a mistake. Research published by Semrush found that only 25% of cited sources overlap between ChatGPT’s Thinking and Instant reasoning modes. Thinking mode favours long-form, data-rich content. Instant mode leans toward concise, direct answers.

For our clients, this means producing both formats: detailed guides with original data for Thinking mode, and tightly structured FAQ-style content for Instant mode. One content type cannot serve both systems effectively.

Technical SEO Now Serves Two Masters: Search Engines and AI Grounding

AI systems pull from the same crawl index as traditional search engines. That makes technical SEO the shared foundation for both channels. We have integrated the updated checks outlined in Semrush’s technical SEO checklist for search engines and AI search into our standard client maintenance workflows. Crawlability, structured data accuracy, and clean internal linking are no longer just ranking factors — they determine whether AI engines can ground answers using your content at all.

Scaling GEO Requires Enterprise-Grade Infrastructure

For larger organisations managing hundreds of pages across multiple markets, standard SEO tooling hits a ceiling fast. As outlined in Semrush’s comparison of its standard and enterprise platforms, the enterprise tier adds cross-team reporting, API-level integrations, and visibility tracking at scale. We recommend enterprise clients evaluate whether their current stack can actually monitor AI citation performance alongside traditional rankings.

The through-line across all five developments is clear: AI visibility and traditional SEO are converging on the same technical and content fundamentals, but the execution details diverge sharply. Agencies and in-house teams that treat GEO as a separate workstream from core SEO will fall behind. We are building unified workflows that address both channels from a single content and technical strategy — and the data from this month confirms that approach is the right one.

Frequently Asked Questions

What are ghost citations in AI search results?

Ghost citations occur when an AI engine like ChatGPT or Gemini links to your URL but never mentions your brand name in its answer. Research shows this happens 62% of the time, meaning users see a footnote rather than a brand recommendation.

How do web designers ensure their sites appear in AI-generated answers?

Start with solid technical SEO: clean crawl paths, accurate structured data, and fast page loads. AI systems use the same crawl index as Google, so a technically healthy site is the baseline requirement for both traditional and AI visibility.

Why does ChatGPT cite different sources in Thinking mode versus Instant mode?

The two modes use different reasoning processes, favouring different content formats and depths. Only 25% of cited sources overlap, so marketers need both long-form data-rich content and concise direct-answer content to cover both modes.

What should I do after Google’s June 2026 spam update?

Run a full backlink audit and review your Search Console for manual actions or indexing issues. The update targets link spam, cloaking, and auto-generated thin content, so any site relying on those tactics should expect ranking drops.