Originally published at https://monstermegs.com/blog/google-may-core-update/
Google's second core algorithm update of 2026 landed on May 21, and the search landscape has shifted in ways that site owners are still measuring. The Google May core update – still rolling out as of this writing, with completion expected around June 4 – is producing ranking volatility that multiple SEO platforms describe as unusually broad in scope. Early data shows nearly 80 percent of top search result positions moved in the first week of the rollout, according to reporting by Search Engine Land. If your organic traffic changed around May 21, here is what happened and what it means for your site.
What the Google May Core Update Actually Changed
Google described the Google May core update in familiar terms: “a regular update designed to better surface relevant, satisfying content for searchers from all types of sites.” That is the standard language the company uses for core updates. What is less standard is the degree of ranking movement recorded by independent tracking tools. Semrush, Ahrefs, and several other SEO monitoring platforms registered volatility scores well above baseline from the first hours of the rollout.
The Google May core update's central focus appears to be topical authority and user experience quality measured together. Rather than targeting a single ranking factor, the update weighs content depth, site-wide topical coherence, and page performance signals as a combined score. Sites that are strong across all three are gaining; sites that are weak on even one are being outranked by pages that perform well across all dimensions.
Page speed and Core Web Vitals are playing a more prominent role in the Google May core update than they did in previous core updates. Google has long listed page experience as a ranking signal, but this update appears to have increased its weighting – particularly for queries where multiple pages offer similar content quality and expertise. When content is close, performance is now the tiebreaker.
Why Nearly 80 Percent of Top Results Shifted
The statistic circulating most widely across SEO communities is striking: nearly 80 percent of top ten search results shifted position in the first week following the Google May core update launch. That is well above the 50 to 60 percent movement that characterised most major core updates over the last three years. The breadth of movement suggests a recalibration of quality signals that affects a wide range of content types rather than a narrow adjustment to a specific class of sites.
The biggest winners are brand sites, official sources, and publishers with deep original content in focused subject areas. The biggest losers are intermediary sites that historically ranked on volume, aggressive interlinking, and keyword targeting rather than genuine expertise. The pattern is consistent with the direction Google has signalled since the helpful content rollout – the Google May core update appears to be the most technically enforced iteration of that project yet.
The Aggregator Penalty
Aggregator sites – platforms that compile listings, reviews, or data from other sources without adding original analysis – took notably heavy losses in the Google May core update. Travel aggregators, coupon directories, and review hubs that have ranked on volume and internal linking rather than original content are seeing position drops across competitive queries. Google is increasingly directing those queries to official sources, brand sites, and publishers with genuine first-hand expertise in the subject, rather than to sites that simply point to them.
Which Sites the Google May Core Update Hit Hardest
Affiliate marketing sites are among the hardest-hit categories in the Google May core update. Tracking data from multiple SEO platforms found that affiliate and templated pages lost as much as 71 percent of their search visibility in competitive verticals. The shared characteristic across affected affiliate sites is a large volume of pages optimised for buying-intent queries without adding substantial original research, product testing, or expert opinion that goes beyond what is already available from manufacturer sites or established reviewers.
Multi-topic websites – those publishing across unrelated verticals on a single domain – also dropped sharply in the Google May core update. Google's systems are giving more weight to topical coherence: a site that covers one subject in genuine depth consistently outranks a broader site covering that same subject thinly, even when the broader site publishes more total content. Domain-wide topical authority is now being rewarded more explicitly than raw publishing volume.
City Landing Pages and Local Search
Local businesses and service providers encountered a specific version of this problem in the Google May core update fallout. Templated city landing pages – near-identical pages created for dozens of service locations that change only the city name – fell sharply in both local pack and organic results. Google has become significantly better at identifying location pages that exist to capture search traffic rather than to provide genuinely location-specific information. Businesses with authentic local content, verified reviews, and accurate business data are weathering this update better than those relying on page-duplication strategies.
AI-Generated Content and the Google May Core Update
AI-generated content remains the most debated dimension of the Google May core update. Google has maintained its consistent position: it does not penalise content for being AI-written, but it does penalise content for lacking expertise, authority, and trustworthiness – regardless of how it was produced. The practical outcome is that content operations using AI to generate bulk output without editorial review, original insight, or subject-matter expertise are losing rankings in large numbers.
The Google May core update appears to be drawing a clearer line between AI-assisted writing and AI-replacement publishing. A journalist or subject-matter expert who uses AI to draft structure and then fills it with original reporting and genuine insight produces a different product from a site that mass-produces AI-generated articles at scale with no editorial input. Pages that contain something a reader genuinely cannot find elsewhere – a real test result, original data, a grounded expert opinion – are the ones holding and gaining positions.
For publishers who use AI writing tools, the message from the Google May core update is not to stop. It is to treat AI output as a starting point rather than a finished product. The gap between AI-generated and human-edited content is where rankings are currently being won and lost, and Google's quality signals are getting better at measuring that gap with each successive update.
Page Speed and Hosting Infrastructure After This Update
One underreported aspect of the Google May core update is the increased weight given to Core Web Vitals as a differentiator when content quality is otherwise comparable. Largest Contentful Paint (LCP), Interaction to Next Paint (INP), and Cumulative Layout Shift (CLS) are the three metrics Google uses to score page experience – and under the Google May core update, sites with strong Core Web Vitals scores are outranking content-equivalent pages that load slowly or behave unpredictably. This is the clearest evidence yet that performance is a substantive ranking factor, not just a tie-breaker on paper.
Server response time and time to first byte (TTFB) directly affect LCP scores. Hosting infrastructure that uses fast NVMe storage and efficient server software produces measurably better TTFB than traditional shared hosting. For more on how NVMe storage improves hosting performance at the server level, the gap between NVMe and spinning-disk hosting is real and measurable in Core Web Vitals. If you are running your site on slow hosting, content quality improvements will hit a ceiling that server performance sets before you expect it.
You can audit your Core Web Vitals in Google Search Console under the Experience section. If LCP is above 2.5 seconds or INP is above 200 milliseconds, server-side improvements may have a more immediate impact on your rankings than content revisions alone. A CDN is also worth considering – this Cloudflare CDN setup guide covers the practical steps for reducing latency for visitors across different geographic locations.
Google's Official Position and Recovery Timeline
Google's official guidance following the Google May core update is consistent with past core updates: there is no quick technical fix, and recovery is measured in the quality of improvements made to content over time. The company points site owners to its creating helpful, reliable, people-first content resource and notes that even high-quality sites can see temporary drops during a core update rollout as the algorithm recalibrates relative quality across many pages simultaneously.
Google has confirmed the Google May core update is not a manual penalty. Drops cannot be resolved through reconsideration requests. Recovery happens through genuine content improvement and is typically reflected in subsequent core updates rather than immediately after changes are made. The current rollout is expected to complete around June 4, 2026. Google recommends against making significant content changes based on ranking fluctuations that occur during an active rollout, since final positions may differ considerably from mid-rollout data.
What Site Owners Should Do Right Now
The most useful first step following the Google May core update is measurement rather than reaction. Open Google Search Console and compare performance data for the week before May 21 against the weeks after. Identify which pages dropped and whether those drops are concentrated on a specific content type – affiliate pages, location pages, AI-generated articles, thin guides. A pattern in the drops tells you where to focus your efforts; a sitewide drop without a clear pattern suggests a broader content quality signal that needs a more comprehensive audit.
Resist making wholesale changes during an active rollout. The Google May core update will not fully settle until early June, and mid-rollout traffic data can be misleading about final positions. Once it completes, prioritise improving your weakest pages: assess their depth, their unique value, and whether they are genuinely answering a reader's need. Hosting performance is worth reviewing in the same period – sites with poor Core Web Vitals should address server speed and resource delivery as part of any post-update response. MonsterMegs' LiteSpeed-powered NVMe hosting is designed to deliver the fast TTFB and strong Core Web Vitals baseline that rankings built on the Google May core update's signals now require.
The Takeaway
The Google May core update is the most emphatic signal yet that Google is enforcing a clear hierarchy: genuine expertise outranks volume, topical focus outranks breadth, and fast page experience outranks slow. The 80 percent shift in top ten results is not statistical noise – it reflects how seriously Google's current systems are measuring content quality, site coherence, and user experience in combination. Sites that dropped are not necessarily doing something wrong; they are simply being outranked by pages that score better across all three dimensions at once.
The recovery path is the same one Google has described for years: create content that genuinely helps people, build authority in a focused subject area, and make sure the technical foundation of your site does not undermine the content work you put in. If your hosting infrastructure is holding back your Core Web Vitals scores, that is a fixable problem with a direct ranking impact. Explore MonsterMegs' fast NVMe web hosting plans to see how server-level performance can give your site a stronger foundation going into whatever Google's next update brings.
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