Google Admits It’s Been Lying About Core Updates (New Documentation Proof)
Google updated core update documentation December 9, 2025—two days before announcing the December update—admitting they run unannounced "smaller core updates" after telling SEOs for years to wait for
TL;DR: Google quietly updated its core update documentation on December 9, 2025, admitting they “continually make updates to our search algorithms, including smaller core updates” that are “not announced because they aren’t widely noticeable.” This contradicts years of official advice telling SEOs to wait for the next major core update to see ranking recovery. The admission explains “phantom” volatility SEOs tracked throughout 2025—December 7-8, December 3-4, pre-Thanksgiving, November 20, November 12, November 8, Halloween, October 15-17, October 7-8—and why Google only announced 3 core updates in 2025 despite promising 6-8 at the beginning of 2024. The documentation change came just 2 days before the December 2025 core update announcement, buried without any blog post or major statement. SEOs have been gaslighted for years about ranking fluctuations Google claimed didn’t exist.
We caught them.
On December 9, 2025, Google updated their core update documentation.
Not with a blog post. Not with a tweet. Just a quiet documentation change that SEOs almost missed.
Here’s the exact language they added:
“However, you don’t necessarily have to wait for a major core update to see the effect of your improvements. We’re continually making updates to our search algorithms, including smaller core updates. These updates are not announced because they aren’t widely noticeable, but they are another way that your content can see a rise in position (if you’ve made improvements).”
Read that again.
“Including smaller core updates. These updates are not announced.”
Two days later, Google announced the December 2025 core update.
The timing wasn’t coincidental. This was damage control before the SEO community connected the dots.
The Lie They’ve Been Telling For Years
For the past five years, Google’s official guidance has been consistent:
“If your site was negatively impacted by a core update, you may see some recovery between updates. But the biggest change would typically occur after another core update.”
That advice appeared in every official core update blog post. Danny Sullivan repeated it. John Mueller confirmed it. Google’s Search Central documentation stated it clearly.
The message: Wait for the next major core update to see meaningful recovery.
Hundreds of case studies followed this guidance. SEO agencies built recovery strategies around it. Publishers held off on major content overhauls, waiting for the “right” timing.
Meanwhile, their rankings kept fluctuating between major updates.
And Google kept saying those fluctuations were normal volatility, not algorithmic changes.
The Phantom Updates Nobody Could Prove
Barry Schwartz from Search Engine Roundtable has been tracking “unconfirmed Google ranking volatility” for over a decade.
Before Google started announcing core updates in 2016, Barry called them “Phantom updates”—algorithm changes Google never confirmed but that clearly happened.
Even after Google started announcing major updates, the phantom volatility continued.
Here’s what Barry documented in just the final months of 2025:
December 7-8: Unconfirmed volatility
December 3-4: Unconfirmed volatility
Pre-Thanksgiving: “A very big one”
November 20: Significant movement
November 12: Ranking shifts
November 8: The “Movember update”
Halloween period: Clear volatility
October 15-17: Unconfirmed changes
October 7-8: Ranking fluctuations
Every single one of these showed up in third-party tracking tools like SEMrush Sensor, SISTRIX Update Radar, and Mozcast.
Every single one generated chatter in SEO communities.
And every single one, Google never acknowledged.
Until December 9, 2025.
The Promise They Broke
At the beginning of 2024, Google promised the SEO community something specific:
More core updates. More often.
The expectation: 6-8 major core updates per year instead of the previous 3-4.
Here’s what actually happened in 2025:
March 2025 Core Update (March 13-27)
June 2025 Core Update (June 30-July 17)
December 2025 Core Update (December 11-29)
Three updates. Not six. Not eight.
Google broke their promise.
Except now we know they didn’t break it. They just stopped announcing half of them.
The documentation update confirms Google was running “smaller core updates” throughout 2025. Every phantom update Barry tracked was real. Every ranking shift SEOs reported was algorithmic, not “normal volatility.”
Google just chose not to tell anyone.
Why The Timing Matters
December 9, 2025: Documentation updated with the admission.
December 11, 2025: December core update announced.
Two days between admission and announcement.
This wasn’t random timing. This was strategic.
Google knew the December update would generate volatility reports. They knew SEOs would compare it to the “unconfirmed” changes from earlier in December (December 3-4, December 7-8).
By updating the documentation first, they could point to it when questioned: “We already told you we run smaller updates.”
Except they didn’t tell us. They buried it in documentation and hoped nobody would notice the contradiction with five years of previous guidance.
The Gaslighting Timeline
Let’s be clear about what happened:
2020-2024: Google tells SEOs to wait for major core updates to see recovery. Smaller ranking changes between updates are described as “normal volatility” or the result of other factors (spam updates, seasonal changes, etc.).
Throughout 2025: SEOs report consistent ranking volatility between the three major core updates. Google doesn’t acknowledge any of it.
December 9, 2025: Google quietly updates documentation admitting they’ve been running unannounced “smaller core updates” all along.
December 11, 2025: Google announces major core update without addressing the contradiction.
This is textbook gaslighting.
SEOs: “We’re seeing ranking changes.”
Google: “That’s just normal volatility.”
SEOs: “But the tracking tools show—”
Google: “Wait for the next major core update.”
SEOs: “Rankings are changing again.”
Google: “Oh by the way, we’ve been running smaller updates this whole time. We just never mentioned it.”
What The Documentation Actually Says Now
Here’s the full updated section from Google’s core update documentation:
“We understand that a site dropping in search results after a core update is a frustrating experience. But it’s important to understand that the changes we make with these updates aren’t against any specific pages or sites. Instead, the changes are about improving how our systems assess content overall. These changes may cause some pages that were previously under-rewarded to do better.
“One way to think of how a core update operates is to imagine you made a list of the top 100 movies in 2021. A few years later in 2025, you refresh the list. It’s going to naturally change. Some new and wonderful movies that never existed before will now be candidates for inclusion. You might also reassess some films and realize they deserved a higher place on the list than they had before.
“However, you don’t necessarily have to wait for a major core update to see the effect of your improvements. We’re continually making updates to our search algorithms, including smaller core updates. These updates are not announced because they aren’t widely noticeable, but they are another way that your content can see a rise in position (if you’ve made improvements).“
The bold section is new as of December 9, 2025.
It fundamentally changes Google’s stance on ranking recovery timing and algorithm update frequency.
Why This Changes Everything
The admission has three massive implications:
1. Recovery Doesn’t Require Waiting
SEOs have been told for years to wait for the next major core update to see recovery after being hit.
Now Google admits you don’t need to wait. Improvements can show up anytime because they’re constantly running smaller updates.
2. “Normal Volatility” Was Never Just Volatility
Every time SEOs reported ranking changes between major updates, Google implied it was noise—seasonal changes, spam updates, or random fluctuations.
Now we know those changes were often algorithmic. Google was running real core updates and choosing not to announce them.
3. The Tracking Tools Were Right All Along
SEMrush, SISTRIX, Mozcast, and other tracking tools showed clear volatility throughout 2025 between major updates.
Google’s silence implied the tools were picking up false signals.
Now we know the tools were accurate. The signals were real. Google just wasn’t being honest about what was causing them.
The December Update’s Perfect Storm
The December 2025 core update launched December 11 and completed December 29.
It showed two major volatility spikes: December 13 and December 20 (both Saturdays).
But here’s what makes the timing suspicious:
Barry Schwartz reported major unconfirmed volatility on December 7-8 and December 3-4—before Google announced the update on December 11.
Was that volatility from a “smaller core update” running before the major one?
We’ll never know. Because Google doesn’t announce those.
What Publishers Are Saying
The reaction from the SEO community has been swift and angry.
One publisher on Search Engine Roundtable:
“I lost over 90% of my traffic during this core update. I was wiped from Discover, wiped from News, and wiped from Search. 1,000 active users to 10, 5 of them bots from China now. Traffic has been systematically decimated throughout all of 2025. It is 10 steps backwards, 1 step forward and so on.”
Another:
“Traffic systematically decimated throughout 2025” matches exactly what Google just admitted—continuous smaller updates nobody announced.
The pattern is clear: Publishers experienced ongoing algorithmic punishment throughout 2025, not just during the three major updates.
And when they asked Google what was happening, they were told to wait for the next core update.
John Mueller’s Contradictory Statements
On December 13, 2025, John Mueller tweeted:
“We try to launch quality improvements as soon as they’re ready & evaluated. Having quality changes ready for a specific date/time is never a given, and pre-announcing for a fixed date isn’t possible.”
This statement directly contradicts the new documentation.
If Google is “continually making updates” including “smaller core updates,” then they clearly can and do schedule algorithm changes.
The documentation admits these smaller updates happen regularly. Mueller’s tweet implies Google can’t control timing.
Both can’t be true.
The SEO Industry’s Response
The admission has ended years of speculation around phantom volatility.
As one industry publication noted: “Google’s admission about unannounced core updates ends years of speculation around phantom volatility.”
But the reaction isn’t celebration. It’s anger.
SEO agencies built strategies around waiting for major updates. Publishers held off on content improvements, thinking they wouldn’t matter until the next big rollout. Businesses made budget decisions based on Google’s guidance that recovery requires patience.
All of it based on incomplete information Google chose to withhold.
What You Should Do Now
The documentation change creates three immediate action items:
1. Stop Waiting For Major Updates
If you were hit by a core update and waiting to implement changes until “the right time,” stop waiting.
Google just admitted improvements can show up anytime. The old guidance about waiting for major updates was wrong.
2. Monitor Rankings Weekly, Not Quarterly
If Google is running smaller core updates continuously, ranking changes aren’t limited to 3-4 major windows per year.
Your monitoring needs to shift from quarterly check-ins around major updates to weekly tracking of ranking fluctuations.
3. Document Everything
Track every ranking change with detailed notes about what content changes you made and when.
If rankings improve between major updates, you now have proof that smaller updates are real and affecting your site.
The Bigger Pattern
This isn’t the first time Google has quietly changed its story.
On AI Content: Google said for years they could detect AI-generated content and it would be penalized. Then in 2023, they changed their guidance to say AI content is fine if it’s helpful.
On Backlinks: Google minimized the importance of links for years, then leaked documentation showed links are still a top-3 ranking factor.
On User Signals: Google denied using click data for rankings for over a decade. Then the DOJ antitrust case revealed they absolutely do.
The pattern is consistent: Google’s public statements don’t match their actual systems.
The core update admission is just the latest example.
Why This Matters For Answer Engine Optimization
Traditional SEO optimized for Google’s announced algorithm changes.
Answer Engine Optimization (AEO) optimizes for being cited by AI systems that don’t announce changes at all.
If Google now admits they run continuous unannounced updates, the difference between SEO and AEO shrinks.
Both require constant optimization. Both require monitoring changes that aren’t announced. Both require adapting to systems that don’t fully explain how they work.
The shift from “wait for major updates” to “we’re always updating” makes the case for AEO even stronger.
When the algorithm is constantly changing, being citation-worthy matters more than trying to time ranking improvements around specific dates.
The Documentation Nobody’s Talking About
The December 9 update wasn’t the only documentation change Google made.
They also clarified language around how core updates work:
“Core updates adjust the main systems Google uses to rank pages. When those systems get reweighted, every type of page can move, including blogs, service pages, category pages, and product pages.”
This confirms core updates are about reweighting multiple systems, not single-factor changes.
But here’s what’s missing: any explanation of what triggers a “smaller core update” versus a “major core update.”
Google still won’t tell us:
How often smaller updates run
What makes an update “small” versus “major”
Whether smaller updates affect all systems or just some
How to know if a ranking change came from a smaller update
The admission created more questions than answers.
The Trust Problem
Google’s relationship with the SEO community has always been complicated.
SEOs want transparency. Google provides controlled messaging.
SEOs want detailed guidance. Google gives vague principles.
SEOs want advance warning of changes. Google says that’s impossible.
But the December 9 documentation update crosses a line from “providing limited information” to “contradicting five years of previous guidance.”
When Google tells you to wait for major updates while secretly running smaller ones, that’s not protecting proprietary information.
That’s misleading the people who depend on your platform for their businesses.
What Happens Next
Three things will happen in 2026:
1. More Phantom Updates Will Be Reported
SEO tracking tools will continue showing volatility between major updates.
The difference now: SEOs know those changes are real algorithmic shifts, not noise.
2. Google Will Be Questioned More Aggressively
Every time Google says “wait for the next core update,” SEOs will reference the December 9 documentation.
Google’s credibility on algorithm guidance has been damaged.
3. The Industry Will Adapt
SEO strategies will shift from timing improvements around major updates to continuous optimization.
The playbook just changed from quarterly to weekly.
The Bottom Line
Google ran unannounced algorithm updates throughout 2025 while telling SEOs their ranking changes were “normal volatility” and advising them to “wait for the next major core update.”
On December 9, 2025—two days before announcing the December core update—they quietly admitted the truth in updated documentation.
The admission explains years of phantom volatility, contradicts their official guidance, and proves SEO tracking tools were right all along.
Publishers who lost traffic throughout 2025 weren’t imagining algorithmic changes. Google was running smaller core updates and chose not to announce them.
The SEO community just got confirmation they’ve been gaslighted for years.
And Google did it with a documentation update most people will never read.
Were you tracking phantom volatility in 2025? Reply with your ranking data and we’ll analyze whether smaller core updates affected your site.
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Want to stop depending on Google’s honesty? Check out how SEOengine.ai optimizes for Answer Engine citations that don’t require waiting for algorithm updates.
Until next week,
The SEOengine Team
P.S. - The next “major” core update typically happens 3-5 months after the last one. That puts it around March-April 2026. But now we know Google will run smaller updates between then and now. Watch your rankings weekly, not quarterly.