SEO from SLEED: The Freshest Facts, Stats & News

From the SEO, Search & Marketing Industry
June 2026

Key SEO KPIs / Metrics (June 2026)	What they mean
68% Zero-click searches	A new record of searches that are completed without a click to a site.
1.08% AI referral traffic	Still small in volume, but with strong growth momentum.
3x more AI citations for fast pages	Page speed directly affects the likelihood of being cited by AI tools.
345,000+ unique sources as Preferred Sources	Branding becomes a “signal” that increases how often you appear in AI answers.
2x likelihood of a click on a Preferred Source	User preference turns into a measurable advantage in visibility/engagement.

June 2026 was the month when Google didn’t just change the game—it simultaneously changed the way we measure it. The year’s second Core Update finished rolling out, leaving strong volatility in rankings, while almost in parallel Search Console gained, for the first time, separate reports for how we perform within AI Overviews and AI Mode.

It’s no coincidence: Google officially recognizes that visibility in AI is now its own channel, with its own numbers. At Google I/O the message became even clearer with Universal Cart, which turns shopping into something AI does on the user’s behalf—from discovery to checkout. Google also clarified that spam policies apply within AI features as well.

Takeaway: For Greek companies and eshops, this year it’s not enough to rank; you need to be chosen, by both people and AI agents.

The FACTS

May 2026 Core Update: Completed, and seriously shook up the rankings

Google confirmed that the second Core Update of 2026, which started on May 21, completed its rollout in early June, taking nearly two weeks. As is typical with core updates, volatility was high throughout, with many sites seeing sharp gains or drops from one day to the next.

Core updates don’t penalize specific pages; they re-evaluate overall which content best serves the user. The logic remains consistent: Google wants to surface sources that provide a complete, trustworthy answer, not pages that act as a stopover. When quality signals change, a large portion of organic traffic shifts with them.

For Greek companies, the right response isn’t panic. If you saw fluctuations during June, wait for the data to stabilize before drawing conclusions or making rushed changes. Focus on queries with real commercial value and compare performance pre/post by page type.

Add an annotation in Search Console with the update date.
Compare performance before and after by page type (categories, PDPs, articles, etc.).
Prioritize losses in commercial queries and fix those first.

Search Console: Separate reports for AI Overviews and AI Mode

On June 3, Google introduced on the official Search Central blog the new Generative AI performance reports in Search Console. These are separate views that show impressions and clicks within Search’s generative AI features, such as AI Overviews and AI Mode, as well as the corresponding features in Discover.

Until now, performance within AI answers was murky: the numbers were merged with classic organic and no one knew for sure how much AI was surfacing them. By providing separate data, Google is essentially acknowledging that AI Search is a distinct visibility channel that deserves its own measurement. This changes how we should build reports and KPIs.

For Greek marketing teams, the action is immediate: when the report arrives in Greece, go into Search Console and record your AI numbers as a baseline. That way, you’ll be able to prove that a drop in classic clicks doesn’t necessarily mean a loss of visibility—it may simply have shifted into AI.

Preferred Sources: Awareness becomes an entry point into AI results

As of May 27, Google brought Preferred Sources into AI Overviews and AI Mode. Users can set favorite sources, which appear with a special badge and, most importantly, are shown more frequently within AI answers. Google reports that more than 345,000 unique sources have already been selected and that users are twice as likely to click a Preferred Source.

The key point is that Preferred Sources isn’t just a display signal—it becomes an active input into which sources the AI chooses to cite. If your audience considers you a trusted source and marks you as a favorite, that translates into a higher likelihood of appearing in their AI answers.

Link SEO with branding: the goal isn’t only rank, but preference.
Encourage your audience to set you as a Preferred Source (where available).
Invest in brand recall through an ongoing relationship via email and content.

Key idea: Awareness is now becoming a ranking/selection factor in AI.

Spam Policies in AI Search: There’s no shortcut to citations

Google clarified in June that spam policies fully apply within AI features as well. Buying, trading, or manipulating citations in AI Overviews and AI Mode is now explicitly treated as spam—just like paid links in classic organic.

The move was expected. Every time a new visibility channel opens up, “shortcut sellers” appear, promising quick presence in AI results. Google is sending an early message: the only sustainable path is real authority.

If someone “guarantees” appearance in AI Overviews, treat it as a risk, not a strategy.
Invest in trustworthy content and digital PR that generates natural mentions.
Build lasting trust brand signals.

Universal Cart: Shopping becomes the AI agent’s job

At Google I/O 2026, Google introduced Universal Cart, a unified, persistent cart that works across Search, Gemini, YouTube, and Gmail. Users can add products from anywhere within Google’s ecosystem, with price tracking and compatibility checks. In parallel, the Agent Payments Protocol was upgraded so an AI agent can complete purchases autonomously, within user-defined limits for brands, products, and budget.

All of this is built on the Universal Commerce Protocol, the new shared infrastructure layer that makes cross-platform checkout more seamless and is already expanding into new markets. The direction is clear: agentic commerce, where AI doesn’t just recommend products, but also manages and completes the purchase.

For Greek eshops, this shifts the center of gravity. When the agent is choosing—not the person scrolling your page—the product feed, product data quality, reviews, and structured data become the store’s new “face.”

Keep your feed clean, complete, and up to date.
Implement correct Product and Offer schema.
Build/show trustworthy reviews.
Make sure the price is machine-readable and competitive.

The STATS

68%: Zero-click searches hit a new record

The SparkToro 2026 study shows that 68% of searches end with no click to an external website. With AI Overviews, featured snippets, and rich results answering directly on the page, users increasingly don’t need to leave Google.

This changes the foundational assumption SEO was built on: that a good position brings clicks. Today you can be visible, influence the decision, and build awareness without ever getting the click. Visibility and the click have decoupled.

Don’t measure success only with sessions; also track impressions, brand searches, and direct.
Structure content that “writes” inside the SERP: clear answers, a clear brand, and a reason to re-search.

1.08%: How small AI referral traffic still is

Despite the massive buzz around AI, 2026 data shows that AI referral traffic makes up only 1.08% of total visits, with 87.4% of that coming from ChatGPT. At the same time, traditional organic search remains above 25% of total traffic.

We need to hold two things at once: AI traffic is growing explosively in percentage terms and converts exceptionally well, but in absolute numbers it’s still small. Abandoning classic SEO to chase AI exclusively is the wrong priority.

Balanced strategy: Invest in organic (where the volume and revenue are today), but in parallel build presence in AI so you’re ready when the channel matures.

3x: Fast pages get three times more AI citations

According to 2026 benchmarks, pages with First Contentful Paint under 0.4s average 6.7 citations in AI tools, while slower pages, with time above 1.13s, drop to 2.1. Put simply, a fast page is about three times more likely to be cited by ChatGPT compared to a slow one.

The explanation is technical but logical: AI crawlers, like Googlebot, have limited time and resources per page. When content loads slowly, the chance increases that it won’t be read properly or fully—therefore it won’t be selected as a source.

Prioritize Core Web Vitals for the pages you want cited.
Reduce render-blocking resources and optimize images.
Improve server response and overall performance budgeting.

From the SEO team at SLEED

Sources

https://searchengineland.com/google-may-2026-core-update-rolling-out-now-478430
https://developers.google.com/search/blog/2026/06/gen-ai-performance-reports
https://www.semrush.com/blog/google-preferred-sources-in-ai-experiences/
https://www.seroundtable.com/june-2026-google-webmaster-report-41446.html
https://www.searchenginejournal.com/google-announces-new-universal-cart-at-i-o/575301/
https://www.digitalapplied.com/blog/sparktoro-zero-click-study-2026-68-percent-seo-analysis
https://www.position.digital/blog/ai-seo-statistics/
https://slatehq.com/blog/ai-seo-statistics