Google rolled out a major Core Update between 21 May and 2 June 2026.
Google didn’t only reward authority or specifically punish aggregators. It rewarded the right type of source for each kind of query. Here is what changed, and what to do about it.
Looking at the Sistrix visibility data measured across the UK and US markets, some clear patterns emerged from the winners and losers. The headline finding is that authority alone did not explain the results. Highly authoritative domains including the New York Times, Nature, Springer, the WHO, and the NIH all lost ground. What mattered more was whether a page was the right type of result for that query.
Researchers are calling it an intent-destination reset
Here is what that means in practice.
The Key Patterns in Plain English
Five clear patterns emerged from the data. Frustratingly, they do not all point in the same direction, which is why broad conclusions about who won or lost tend to mislead.
Being the original beats being an aggregator
Merriam-Webster and Cambridge Dictionary gained significantly. Sites that aggregate or scrape dictionary content, or offer pronunciation tools as a layer on top of existing reference material, lost heavily. Google appears to be asking a simple question: is this the place someone should actually go for this information, or is it a step removed from the real answer?
Forums and Q&A sites took a hit
This matters because Google has been actively boosting Reddit-style content since 2023 as part of its helpful content and first hand experience push. That appears to be reversing. Reddit, Quora and StackExchange all declined. Reddit’s percentage drop was smaller than some others, but because its overall visibility is so large, the absolute loss in ranking points was among the biggest of any domain measured.
UK searches now strongly favour UK websites
Amazon.co.uk and eBay.co.uk both gained in UK search results. Amazon.com and Walmart.com each lost more than 50% of their UK visibility. Google is now much more aggressively matching searchers to locally relevant domains. The same domains held steady in US results, which confirms this is a market-fit signal rather than a penalty on those brands.
Not all aggregators lost. Task destinations gained.
The distinction is not between aggregators and non-aggregators. It is between sites where users can complete the task and sites that summarise information about completing the task elsewhere. Travel and jobs marketplaces gained because they are the destination. Skyscanner, Indeed and Booking.com all went up. Comparison and reference layers that describe options without letting you act on them were more exposed.
Health split by trust and result fit
WebMD and the NHS broadly held or rose. Drug price tools and symptom checkers dropped sharply. Even the WHO and NIH lost ground on certain query sets. A global authority page, a symptom checker, a drug pricing tool and a patient-friendly explainer are not interchangeable results in Google’s view, even if they all sit within the same health vertical.
We think the clearest way to frame this update is that Google recalibrated which source it treats as the default destination for each query. Authority still matters. But format, market fit, and whether you are where the task gets done now matter just as much.
What to Check on Your Website
Specific things to look at:
Are you the destination, or a layer in between?
Ask yourself honestly: can someone complete their goal on your page, or are you summarising what they could find somewhere else? Comparison sites, affiliate sites, and reference tools are most at risk here. If you sit between the user and the answer, you now need a much stronger reason to exist in Google’s results than you did six months ago.
Check your traffic by query type, not total
Do not look at your site traffic as a single number. Break it down by query clusters. Did you lose on informational queries but hold on transactional ones? Did certain topic areas drop while others stayed flat? That breakdown tells you exactly where Google changed its preference for your site, which gives you something specific to act on.
If you are targeting UK users, audit your localisation signals
Do you have a .co.uk domain or clear UK-specific signals throughout the site? Is your pricing in GBP, with UK-relevant shipping, returns, and support? Are your hreflang tags correctly set up if you run both a .com and a .co.uk version? Does your content genuinely address UK users, or is it written for a global or US audience?
Go and look at what is actually ranking for your key queries
Search your most important terms and look at what is sitting in the top positions now. Is it videos? Official sources? Marketplaces? Q&A threads? If the results are a fundamentally different format to your own pages, that is your problem. Not your authority score, not your backlink profile. Format mismatch.
If you run a forum or UGC site
The boost that drove Reddit’s growth between 2023 and 2025 appears to be unwinding. Audit whether thin or low-confidence user-generated content is pulling down your overall site signals. The question is not just whether individual posts are useful, but whether the volume of low-quality content outweighs the strong content in Google’s assessment of the whole domain.
For health or YMYL sites specifically
E-E-A-T signals, author credentials, and trust indicators remain necessary, but they are no longer sufficient on their own. You also need to check whether your page format still matches what Google wants to surface for each query. A symptom checker and a patient-friendly explainer are different result types, even when they cover the same condition. Check which format is winning for your target queries, and be honest about whether your pages are that format.
The Question to Keep Asking
“For this query, in this market, in this result format, is my page still the best default destination?”
If you cannot answer that with confidence, that is where to focus. Not on tweaking metadata or refreshing publish dates, but on whether the page itself is genuinely the right result for the people searching.
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