Resources > 2026 Google Algorithm Core Updates Explained

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Introduction

Google’s Priorities in 2025 and Into 2026

Throughout 2025 and continuing in 2026, Google has consistently reinforced the same set of core priorities:

1. AI-powered search experiences
2. User intent over keywords
3. High-quality, trustworthy, experience-based content
4. Reducing low-value or manipulative SEO tactics

Google has been consistent, this is a compounding thesis. Each update cycle, Google gets better at enforcing the same principles it has been signalling since 2022. Marketers who implement this will be better suited for every future update. 

Recap of Key 2025 Algorithm Updates

Helpful Content System 2.0 Expansion

Google significantly tightened its stance on low-value content in 2025. Pages created primarily for rankings — especially mass-produced or purely AI-generated content without human editorial oversight — saw noticeable declines. Content that demonstrated first-hand experience, original insight, and evidence-backed claims consistently outperformed generic rewrites.

AI Overviews Prioritization Update

AI Overviews became a central feature of search in 2025, powered by Google’s Gemini models. These AI-generated summaries appear at the top of results for a growing share of queries, reshaping click behavior across every industry. More on the scale of this shift in the AI Overviews section below.

Search Spam Updates and SpamBrain Enhancements

Google’s spam detection systems improved significantly throughout 2025. Scaled content farms, manipulative backlink schemes, and thin or outdated pages were penalized more aggressively. The August 2025 spam update alone took nearly four weeks to roll out, signalling how broadly it swept.

E-E-A-T Weighting Shift

Experience as a ranking signal grew stronger in 2025. Google increasingly favoured content that demonstrated real-world involvement through original photos, case studies, data from actual use, and verifiable author credentials. Proof-based content consistently outperformed generic summaries.

Local Search and Structured Data Improvements

Local search strengthened around hyper-local ranking factors — proximity, offline reputation, Google Business Profile activity, and real customer interactions. Structured data and schema markup became more impactful as AI Overview visibility and entity trust signals grew in importance.

December 2025 Core Update

The December 2025 core update was widely described as a broad recalibration designed to better align search results with user intent, and reinforced that E-E-A-T, content depth, and technical SEO remain critical ranking foundations. SEO analysts noted it as one of the most powerful updates of the year, with major news publishers among those most heavily impacted.

What’s New in 2026: Three Updates Already

Content marketing must shift toward authenticity.

Thin, generic content declined in performance throughout 2025. Winning content now requires real case studies, quotes, demonstrations. Essentially proving you know what you’re talking about.

Google has written an incredibly helpful guide on writing human-centered content that will rank effectively on their platform.

Brand building is really important.

Brand strength now directly supports SEO stability. Strong entity signals: consistent mentions, reviews, and authoritative references help protect rankings during core updates. Brand building is now an SEO strategy.

Multi-format content is absolutely essential.

Marketers relying solely on written blogs risk losing visibility in AI-driven search experiences. Google increasingly surfaces:

• Short-form video
• Image carousels
• Visual step-by-step guides
• Interactive tools

If you aren’t already, this means you need to diversify your content plans and get creative!

What the March 2026 Core Update is Rewarding

Despite Google’s understated official language, real ranking data reveals clear patterns in what the March 2026 update rewarded and punished.

Information Gain became the dominant signal. This is the single most important shift in the March 2026 Core Update. Google is now explicitly evaluating how much genuinely new information a page contributes compared to content that already ranks for the same query. Pages that simply rephrase existing top results without adding original data, first-hand experience, proprietary insights, or unique perspectives are losing ground fast.

E-E-A-T requirements tightened further. Google’s E-E-A-T framework rewards content attributed to authors with verifiable credentials and a consistent publishing history on the topic. Anonymous content, or content attributed to generic author profiles with no verifiable track record, is losing ground regardless of its quality.

AI-assisted content was not penalised categorically. The March 2026 core update did not ban or universally penalize AI-generated content. What it penalized was content produced at scale without meaningful human editorial oversight and with no genuine information gain — regardless of whether that content was written by AI or humans.

Recovery timing matters. Content quality improvements are typically recognized at the next major core update, expected in June or July 2026. Start improvements now to be in position for that next cycle. ClickRank

AI Overviews: It Changes Everything

If the core updates are reshaping what ranks, AI Overviews are reshaping where visibility lives.

A twelve-month analysis spanning February 2025 to February 2026 reveals that AI Overviews now trigger on nearly 48% of all tracked queries, a 58% increase year over year. In specific industries, the growth has been especially pronounced: Education queries went from triggering AI Overviews 18% of the time to 83%, B2B Tech climbed from 36% to 82%, and Restaurants went from 10% to 78%.

The CTR impact is real. AI Overviews already decrease click-through rates by an average of 34.5% for top-ranked positions, and some sites are reporting traffic losses of 20–60%.

But there’s an important upside: sites that earn citations inside AI Overviews can actually see CTR increases of up to 35%. Being the source Google cites provides a significant visibility advantage.

The implication for 2026 is clear: SEO is no longer just about ranking on page one. It’s about being the source AI Overviews choose to cite. That requires the same fundamentals that have always driven good SEO, authoritative, original, well-structured content, but applied with AI interpretation in mind.

What These Updates Mean for Digital Marketers

Content must demonstrate authenticity and original insight. Thin, generic content is declining in performance regardless of how well it is optimized. Winning content now requires real case studies, original data, and demonstrated expertise. Google has published a helpful guide on writing human-centered content that remains the clearest statement of what they reward.

Brand building is an SEO strategy. Brand strength directly supports SEO stability. Consistent mentions, reviews, and authoritative references create entity signals that protect rankings during core updates.

Multi-format content is essential. Marketers relying solely on written blogs risk losing visibility in AI-driven search experiences. Google increasingly surfaces short-form video, image carousels, visual step-by-step guides, and interactive tools. Diversify your content formats.

Optimizing for AI Overviews is now a primary goal. Structure content with clear definitions, bullet points, step-by-step explanations, and direct answers. Content that AI systems can easily parse and cite will increasingly outperform content written purely for keyword matching.

What These Updates Mean for SEO Teams

Information Gain over repetition. Google prioritizes content that adds something genuinely new to the conversation. Repeating what already exists, even if technically optimized, delivers diminishing returns. Keyword-first strategies alone no longer work.

Technical SEO is necessary but not sufficient. Site speed, accessibility, clean architecture, and schema are still essential. But technical excellence without strong content and credibility won’t guarantee rankings in the post-March 2026 landscape.

Backlinks: quality over quantity. Google became far more selective in 2025 and continues that trajectory in 2026. The strongest links come from trusted industry sites, associations, local authorities, and authored contextual mentions. Aggressive link buying is penalized more frequently.

Topical authority matters more than ever. Content clusters outperform isolated blog posts. Google favours websites that demonstrate depth across an entire topic, not just individual keywords.

What All of This Means for AEO

Google’s move toward answers over blue links accelerated through 2025 and has become structural in 2026.

Optimize for AI Overviews. To appear in AI Overviews, content should include clear definitions, bullet points, step-by-step explanations, comparisons, and summaries. Evidence and structure matter more than length.

Think beyond Google. ChatGPT had 800 million weekly users by October 2025, with information-seeking overtaking content creation as the primary use case. Perplexity AI grew to a $20 billion valuation, processing 780 million monthly queries. Young Urban Project Optimizing for Google alone is no longer the full picture, visibility across AI-generated answers on multiple platforms is where the game has moved.

Zero-click search will keep growing. Many users now get answers without visiting websites. To offset this, brands must offer deeper value (tools, templates, calculators, downloadable resources) that go beyond surface-level answers.

Conversational search optimization. Search is increasingly conversational. Content should reflect natural language, with question-formatted headings and thorough FAQ sections.

Your 2026 SEO Action Plan

1. Prioritize high-value, human content. Invest in expert contributors, original research, and first-hand experience. Generic AI-generated content without editorial oversight will continue to lose ground.
2. Build your brand as an entity. Write detailed author bios, earn authoritative mentions, and maintain consistent branding across platforms.
3. Optimize for AI Overviews and GEO. Use schema, concise answers, and structured formatting. Think about whether your content can be easily cited and summarized by AI systems.
4. Refresh outdated content. Updating existing content is often more effective than publishing new pages. The next core update is expected June or July 2026, improvements made now can be recognized then.
5. Create proof-based content. Show processes, results, and real-world experience with screenshots, data, and case studies.
6. Strengthen local SEO. Focus on reviews, photos, Google Business Profile activity, and community engagement.
7. Check your March 2026 data. Compare pre-March 27 performance against post-April 8 performance in Search Console. Diagnose whether any drops came from the spam update (March 24–25), the core update (March 27 onward), or both and address them independently.

Conclusion

Search has changed fundamentally over the past eighteen months, and 2026 is proving to be the year those changes become non-negotiable. Three updates in ten weeks. AI Overviews on nearly half of all queries. A core update that rewarded originality and penalised repetition at scale. Google is actively enforcing, not warning or experimenting.

Marketers who focus on genuine expertise, original insight, clear structure, and multi-surface visibility will compound their advantage through every future update cycle. Those relying on outdated tactics will find each update more disruptive than the last.

The next major core update is expected in June or July 2026.

This article was updated in April 2026 to reflect Google’s 2026 algorithm activity to date, including the February Discover update, March 2026 Spam Update, and March 2026 Core Update. It was produced with AI assistance and reviewed by the Nutech Digital team. It is intended for informational purposes only.