Google today expanded its Preferred Sources feature into AI Overviews and AI Mode, announcing a set of updates that give publishers new tools to surface content in AI-powered search responses - while also introducing "Highly Cited" labels and prominent article carousels designed to make original reporting more visible.

The announcement, published May 27, 2026, on the company's official blog by Duncan Osborn, Product Manager at Google Search, confirms that any website publishing fresh content is now eligible to appear as a preferred source inside AI search experiences. Previously, the personalization feature was more closely associated with news sites and Top Stories placements.

What changed today

According to Google, the Preferred Sources feature - which allows users to designate specific websites as favored content origins - now extends into AI Overviews and AI Mode. When a user has added a site as a preferred source, links from that site appearing inside AI-generated responses will carry a visible "Preferred" badge, making them easier to identify within the synthesized answers those features produce.

The mechanics are straightforward. A user visits Google Search personalization settings, selects preferred sources through the source preferences tool, and those selections then influence which links receive the badge across Top Stories, AI Overviews, and AI Mode. According to the Google announcement, users have already selected more than 345,000 unique sources through this system. The company also states that people are twice as likely to click through to a link carrying the Preferred label compared to non-labeled links - a notable engagement differential given the context of sustained publisher traffic decline across AI search surfaces.

Any website that publishes fresh content is eligible, according to Google's documentation. There is one eligibility constraint worth noting: only domain-level and subdomain-level sites qualify. A root domain such as https://www.example.com and a subdomain such as https://code.example.com are both eligible, but a subdirectory like https://www.example.com/blog is not.

How publishers can direct readers to the tool

Google's Search Central documentation, last updated May 27, 2026, outlines two primary methods for site owners who want to encourage their audiences to add them as a preferred source.

The first involves a direct deeplink. Publishers can construct a URL in the format https://google.com/preferences/source?q=example.com - substituting their own domain in place of example.com - and share it via social posts, newsletters, or inline promotions. Following this link takes the reader directly to the source preferences tool with the publisher's site pre-populated.

The second method involves adding a button to a site's standard social call-to-action area. According to Google's documentation, downloadable button assets are available in 16 languages: Danish, English, Estonian, Finnish, French, German, Hebrew, Hindi, Japanese, Korean, Brazilian Portuguese, Russian, Spanish, Swedish, Turkish, and Ukrainian. Publishers are not required to use Google's supplied assets - custom designs are permitted.

Importantly, neither method is described as a prerequisite for appearing as a preferred source. These are audience development tools, not ranking signals. A site does not need to display a button to be eligible; the designation happens entirely on the user side.

Prominent article carousels for developing topics

Beyond the badge system, Google today also announced a new presentation format for articles covering developing topics. According to the announcement, for certain searches about ongoing subjects, results will now include a prominent carousel of article links rather than burying them beneath AI-generated text. The carousel is explicitly designed to surface timely content and will highlight a user's preferred sources where available.

This is a structural change in how AI responses are displayed for news-adjacent queries. Instead of presenting a synthesized paragraph followed by a small selection of citations at the bottom, the new format gives article links a more prominent visual position - closer to the top and in a scrollable format. The precise trigger conditions for when the carousel appears are not specified in detail by Google, but the announcement connects it to "developing topics" and "questions about a topic you're interested in."

A second, related carousel is described as forthcoming. According to Google, some searches will soon also show a similar carousel drawing from "online discussions, forums, and social media" - surfacing firsthand perspectives alongside or instead of more traditional editorial content.

"Highly Cited" labels target original reporting

The third distinct update announced today involves a new badge called "Highly Cited." According to Google, this label will appear on web article links on the search results page to indicate that a given article has been cited by many other pieces of reporting. The intent is to help users identify primary sources - the article that others are referencing rather than one of the downstream reports drawing from it.

Google also states it will indicate when an article explicitly references a Highly Cited source, adding a second layer of citation tracing to the results interface. Neither change requires publisher action. Both are calculated by Google based on cross-publication linking patterns.

The combination of the Preferred badge and the Highly Cited badge means that a single article link on a search results page could carry two distinct labels simultaneously - one indicating it comes from a source the user has personally selected, and one indicating it has been heavily cited within the broader media ecosystem.

Context: a feature with history, arriving at a critical moment

Preferred Sources did not begin with today's announcement. The feature first surfaced as a Search Labs experiment in June 2025 and underwent a full global rollout before April 2026. Google announced the global expansion of Preferred Sources in December 2025, initially in English and then across all supported languages. At that stage, the feature was concentrated in Top Stories and did not extend into AI Overviews or AI Mode. Today's update closes that gap.

The timing is significant. Small publishers have lost 60% of their search traffic over the past two years, according to Chartbeat data published in March 2026. Google Web Search traffic to news publishers declined from 51% to 27% between 2023 and 2025, while Google Discover climbed to account for 67.51% of Google traffic to news organizations, according to NewzDash analysis. Google AI Overviews reduce clicks on the first organic result by an average of 34.5%, according to Ahrefs research comparing 300,000 searches from March 2024 and March 2025.

Against that backdrop, the expansion of Preferred Sources into AI surfaces represents one of the few official mechanisms Google has offered that puts some control over discoverability back in publishers' hands - at least for publishers that already maintain an audience willing to take a deliberate action inside Google settings.

The scale of AI Mode itself adds context to that relevance. AI Mode surpassed one billion monthly active users globally as of May 2026, according to a data report Google published on May 19, 2026. Query volumes in AI Mode have more than doubled every quarter since the feature's US launch in May 2025. Google has simultaneously introduced shopping ads and other commercial formats into AI Mode as the surface has grown. Any feature that affects visibility inside AI Mode now operates at a scale comparable to traditional search.

What Liz Reed said about content depth

The announcement connects directly to a broader positioning argument Google has been making about what kinds of content its AI systems prefer to surface. Liz Reed, Google's Head of Search, has stated that what users click on inside AI Overviews is "content that is richer and deeper, not just the answer." Reed has also noted that surface-level AI-generated content does not attract clicks because readers who have already received an AI-synthesized answer do not benefit from clicking through to a page that repeats the same material.

The implication for publishers is that the Preferred Sources mechanism is most valuable for sites producing original, in-depth, or experiential content that goes beyond what an AI summary already covers - precisely the type of work that the "Highly Cited" label is also designed to reward.

Google's new documentation on optimizing content for AI search features, published May 15, 2026, had already addressed related questions about commodity content - a term Google uses to describe material whose informational value is fully captured by AI-generated responses. That guide drew attention to retrieval-augmented generation and query fan-out as the technical mechanisms underlying how AI features select which content to surface.

Today's announcement builds on a related set of changes Google made earlier this month. On May 6, 2026, Google announced five updates to AI Mode and AI Overviews focused on outbound links, including an "explore new angles" section that appends article links to the end of AI responses, and a feature that surfaces firsthand perspectives from public discussions. The May 27 announcement extends that direction with a more prominent carousel format and adds the personalization layer through the Preferred Sources integration.

The trajectory across May 2026 - the outbound link update on May 6, the AI Mode behavioral data report on May 19, the Google I/O 2026 announcements also on May 19, and today's Preferred Sources expansion - reflects a concentrated period of change across Google's AI search surfaces. Whether the cumulative effect of these changes meaningfully alters traffic patterns for publishers remains an open question.

Timeline

Summary

Who: Google, announced by Duncan Osborn, Product Manager at Google Search, with implications for all web publishers and site owners who publish fresh content.

What: Google expanded its Preferred Sources personalization feature into AI Overviews and AI Mode, so that links from user-designated preferred sites carry a visible badge inside AI-generated responses. The update also introduces prominent article carousels for developing-topic queries, a forthcoming carousel for forum and social media perspectives, and "Highly Cited" labels on article links that have been widely cited by other publications.

When: The announcement was published on May 27, 2026. The Preferred Sources feature itself has been available in various forms since June 2025, with a global rollout completed ahead of today's AI-surface extension.

Where: The features operate across Google Search globally - in Top Stories, AI Overviews, and AI Mode - in all languages and locales where those features are available.

Why: The update arrives as publishers face significant and documented declines in search-driven traffic following the rollout of AI-generated answers across Google's surfaces. Extending the Preferred Sources badge and prominent carousels into AI experiences gives publishers a mechanism - dependent on audience action - to maintain visibility as AI responses displace traditional blue-link results for a growing share of queries. The "Highly Cited" label separately attempts to reward original, widely-referenced reporting with additional surface-level recognition.

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