Lab
SEO and GEO analysis, backed by numbers.
The Lab publishes what we measure while running SEO and GEO engagements: crawls, Search Console exports, answers from ChatGPT, Perplexity and Gemini captured on a given date. Each article starts from a question a CMO or Head of Growth actually asks, shows the method and the numbers, then states what cannot be concluded. Four sections: SEO for organic search, GEO & AEO for visibility in AI engines, Tech & Web for standards and protocols, News & Insights for the news that shifts your priorities.
flowConf 2026: AI visibility is no longer an emerging topic, it's the new standard
Vydera was a sponsor of flowConf 2026 in Belgrade. What was said there confirms what we've seen from the start: the visibility battle has shifted from classic SEO to AI answer engines.
Read articleGoogle core updates: 5 questions before you blame the update
16 Search Console properties and 492 days of daily clicks matched against Google’s official update calendar. Across 6 measurable updates, 70.8% of sites never move beyond their own noise.
Read articleAI content and Google: the day the rule changed its name, not its target
166 Search Central blog posts, 2 rater guideline PDFs, 1,772 archive captures. What Google actually writes about AI-produced content.
Read articleE-E-A-T: the signals Google actually reads on your site
Eleven E-E-A-T signals measured across 17 French SEO agencies and 170 articles. Published scale, full ranking, self-assessment grid.
Read articleAI traffic in GA4: 1% of sessions, and GA4 files it wrong
40 GA4 properties, 2,085,299 sessions, 12 months. AI traffic is 1.02% of the total, it is flat, and four counting methods out of five undercount it.
Read articleBuilding an SEO agent: the 6 blocks, what we measured, the limits
9 agents, 539 tool calls, 2 h 22 of wall-clock time. The six blocks of an SEO agent, priced on a real batch, failures included.
Read articleAI SEO: what the term actually covers in 2026
We measured 162 French keywords and 12 months of Search Console. The vocabulary that names AI SEO has volume; the one describing the work has none.
Read articleGEO consultant: 47 offers read, what to demand
47 GEO offer pages read line by line: 11 terms for one discipline, 2 named artefacts at the median, 7 published prices out of 47, zero committed engagement length.
Read articleAI SEO agency: 15 questions, and why 14 of 27 quote someone else’s numbers
27 French SEO agency websites measured. Seven publish a number committing their own work, fourteen only quote third-party studies.
Read articleAI visibility audit: 12 copy-paste prompts for Claude, ChatGPT and Perplexity
12 AI visibility audit prompts, copied in one click, plus the logging grid. None was run for this article: what is measured here is the demand.
Read articleAI citation rate: 20 definitions read, 6 different denominators
20 metric definitions collected from 6 vendors. Seven publish no formula at all, the other thirteen divide by six different denominators.
Read articleGPTBot, ClaudeBot, PerplexityBot: who's crawling your site, and should you let them?
36 robots.txt files read on 27 August 2026: 8 sites name an AI crawler, none blocks an answer engine. The decision table, bot by bot.
Read articleThe SEO and AEO dashboard: 9 blocks, and why three will never agree
Seventeen endpoints probed one by one: freshness, ceilings and costs measured block by block. Plus three blocks of the same dashboard that never agree on a total.
Read articleRank tracking: your tool measures one country, not your traffic
30 queries, Search Console average position against a SERP pulled the same morning. On 18 of them, the comparison never even happens.
Read articleSEO ROI: the three assumptions nobody measures
The three inputs of an SEO ROI calculation, measured on our own Search Console. None of them holds. The calculator outputs a range, not a number.
Read articleSEO KPIs: 20 tested one by one, 12 drive decisions, 8 don't
20 KPIs called one by one on their endpoint, HTTP code included. 12 drive decisions, 8 do not. And Search Console shows only 30% of our site's clicks.
Read articleSEO migration: the real risk isn't the bad redirect, it's the abandoned page
883 URLs followed hop by hop across 23 public domains. The dominant defect is not the redirect to the home page: it is the old URL left to 404.
Read articlehreflang: across 19 multilingual sites, the top defect is a forgotten template
19 multilingual sites, 110 pages, 790 hreflang declarations measured. The classic syntax errors have gone. What is missing is markup on entire templates.
Read articleJavaScript and SEO: Googlebot and AI crawlers get the same page
27 URLs fetched by a browser, Googlebot, GPTBot and ClaudeBot. The content gap between Googlebot and GPTBot is zero. The real gap sits elsewhere.
Read articleDoes semantic siloing still hold up against LLMs?
Nine French SEO sector sites crawled the same day. The expected siloing signature shows up nowhere, and the real architecture gap sits elsewhere.
Read articlePage not indexed by Google: a 7-cause decision tree
168 URLs run through Google's inspection API. Six technical causes ruled out, one explains the 28 non-indexed pages.
Read articleInternal linking: one method that works for Google and for AI engines
825 internal links mapped on our own site, cross-checked against 12 months of Search Console. Correlation between linking and clicks: +0.05.
Read articlellms.txt: what it actually does, and what it doesn't
What llms.txt does, what it doesn't, and what we measured across 31 industry sites. Interactive anatomy of the file.
Read articleThe 10 best GEO agencies in France
Ten French GEO agencies: the generative engines each works on, the indicators it reports and the deliverables it publishes.
Read articleThe 10 best SEO agencies in France
Ten French SEO agencies and what each publishes concretely about its own work: figures, client cases, tools.
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flowConf 2026: AI visibility is no longer an emerging topic, it's the new standard
Vydera was a sponsor of flowConf 2026 in Belgrade. What was said there confirms what we've seen from the start: the visibility battle has shifted from classic SEO to AI answer engines.
Read articleCan AI agents really deliver for SEO and AEO? 5 concrete use cases
Claude Code, MCPs and AI agents: 5 concrete workflows to automate your SEO and AEO. Takeaways from the Vydera x Digidop live.
Read articleMarch 2026 Spam Update: what 19h30 reveals about SpamBrain
The fastest spam update in Google's history just wrapped. Here's what it actually says about SpamBrain, and why it changes the rules of the game.
Read articleWebMCP: why making your site agent-ready will reshape AI visibility
A new W3C standard co-developed by Google and Microsoft is about to change how AI agents interact with the web. Here is what it means for your visibility.
Read articleComparison Page SEO: How to Rank for "X vs Y" Queries
"X vs Y" queries capture users at the decision stage. Here's how to structure and optimize your comparison pages to dominate them in SEO.
Read articleGemini vs ChatGPT vs Perplexity vs Claude vs Copilot: What Are the Differences for Your Visibility in 2026?
Not all AIs cite content the same way. Here's what that changes for your visibility in 2026.
Read articleWhat Is RAG (Retrieval-Augmented Generation)? And Why It Impacts Your Visibility
RAG is why ChatGPT cites some websites and not others. Here's how this mechanism works, and what it means for you.
Read articleWhat Is Query Fan-Out? The Core Mechanism Behind LLM Search
How AI models split your searches into dozens of sub-queries before responding, and why this changes the rules of the game for your visibility.
Read article10 Prompts to Audit Your SEO and AI Visibility With Claude
10 prompts to turn Claude into your SEO and AEO assistant. Technical audits, content gaps, structured data, and AI search visibility.
Read articleHow to Optimize Your Content to Get Cited by AI
Your content might be great, but is it structured to be extracted and cited by AI?
Read articleWhat Is GEO / AEO? Complete Definition 2026
ChatGPT is answering your prospects before they ever click on Google. Here's what that means for your visibility.
Read articleSEO vs AEO: what actually changes (and what stays the same)
AEO isn't a new SEO. It's an extension — but one that changes how you measure and build your visibility.
Read articleHow Do Generative AI Responses Work?
The guide to understanding how AI generates responses and how to appear in the sources they cite.
Read articleThe 10 Best AEO Tools to Track Your AI Visibility in 2026
The essential tools comparison to track and enhance your presence in generative AI responses.
Read articleStructured Data: Essential for SEO and AEO in 2026
Structured data is the technical foundation to exist in SEO and AEO.
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