--- title: "Vydera Lab - SEO, GEO and AI search resources and insights" description: "SEO and GEO monitoring, strategic analysis and expert resources. Vydera Lab decodes shifts across Google, ChatGPT, Perplexity and Gemini for growth teams." url: "https://vydera.com/en/lab" lang: "en" alternates: - lang: fr url: https://vydera.com/fr/lab --- 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. 26/5/2026 News & Insights ## [flowConf 2026: AI visibility is no longer an emerging topic, it's the new standard](https://vydera.com/en/lab/flowconf-2026-ai-visibility-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 article 9/10/2026 SEO ## [Google core updates: 5 questions before you blame the update](https://vydera.com/en/lab/core-update-grille-lecture) 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 article 7/10/2026 News & Insights ## [AI content and Google: the day the rule changed its name, not its target](https://vydera.com/en/lab/contenu-ia-penalite-google) 166 Search Central blog posts, 2 rater guideline PDFs, 1,772 archive captures. What Google actually writes about AI-produced content. Read article 5/10/2026 SEO ## [E-E-A-T: the signals Google actually reads on your site](https://vydera.com/en/lab/eeat-signaux-mesurables) Eleven E-E-A-T signals measured across 17 French SEO agencies and 170 articles. Published scale, full ranking, self-assessment grid. Read article 3/10/2026 GEO & AEO ## [AI traffic in GA4: 1% of sessions, and GA4 files it wrong](https://vydera.com/en/lab/mesurer-trafic-ia-ga4) 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 article 1/10/2026 Tech & Web ## [Building an SEO agent: the 6 blocks, what we measured, the limits](https://vydera.com/en/lab/construire-agent-seo) 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 article 29/9/2026 GEO & AEO ## [AI SEO: what the term actually covers in 2026](https://vydera.com/en/lab/referencement-ia-definition) 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 article 28/9/2026 GEO & AEO ## [GEO consultant: 47 offers read, what to demand](https://vydera.com/en/lab/consultant-geo-metier) 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 article 28/9/2026 SEO ## [AI SEO agency: 15 questions, and why 14 of 27 quote someone else’s numbers](https://vydera.com/en/lab/choisir-agence-seo-ia) 27 French SEO agency websites measured. Seven publish a number committing their own work, fourteen only quote third-party studies. Read article 28/9/2026 GEO & AEO ## [AI visibility audit: 12 copy-paste prompts for Claude, ChatGPT and Perplexity](https://vydera.com/en/lab/prompts-audit-visibilite-ia) 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 article 27/9/2026 GEO & AEO ## [AI citation rate: 20 definitions read, 6 different denominators](https://vydera.com/en/lab/taux-citation-ia) 20 metric definitions collected from 6 vendors. Seven publish no formula at all, the other thirteen divide by six different denominators. Read article 25/9/2026 GEO & AEO ## [GPTBot, ClaudeBot, PerplexityBot: who's crawling your site, and should you let them?](https://vydera.com/en/lab/crawlers-ia-robots-txt) 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 article 23/9/2026 SEO ## [The SEO and AEO dashboard: 9 blocks, and why three will never agree](https://vydera.com/en/lab/dashboard-seo-geo) 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 article 21/9/2026 SEO ## [Rank tracking: your tool measures one country, not your traffic](https://vydera.com/en/lab/suivi-positions-limites) 30 queries, Search Console average position against a SERP pulled the same morning. On 18 of them, the comparison never even happens. Read article 19/9/2026 SEO ## [SEO ROI: the three assumptions nobody measures](https://vydera.com/en/lab/roi-seo-calcul) 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 article 17/9/2026 SEO ## [SEO KPIs: 20 tested one by one, 12 drive decisions, 8 don't](https://vydera.com/en/lab/kpi-seo-decision) 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 article 15/9/2026 SEO ## [SEO migration: the real risk isn't the bad redirect, it's the abandoned page](https://vydera.com/en/lab/migration-plan-redirection) 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 article 13/9/2026 SEO ## [hreflang: across 19 multilingual sites, the top defect is a forgotten template](https://vydera.com/en/lab/hreflang-guide) 19 multilingual sites, 110 pages, 790 hreflang declarations measured. The classic syntax errors have gone. What is missing is markup on entire templates. Read article 11/9/2026 Tech & Web ## [JavaScript and SEO: Googlebot and AI crawlers get the same page](https://vydera.com/en/lab/javascript-seo-rendu) 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 article