---
title: "SEO/GEO Markup: Schema.org, JSON-LD & ARIA for LLMs"
description: "Optimize your markup for Google and generative AI. Schema.org, JSON-LD and ARIA standards implementation to maximize your chances of being cited by ChatGPT and Perplexity."
url: https://edgeangel.co/en/performance-acquisition/seo-geo-markup
lang: en
---

> Site index for agents, read it before exploring further : https://edgeangel.co/llms.txt
> Canonical HTML page, which also carries the diagrams and visuals : https://edgeangel.co/en/performance-acquisition/seo-geo-markup

# SEO & GEO Markup

Speak the Language of Machines

Schema.org, JSON-LD, ARIA... These technical standards allow Google robots and LLMs to instantly understand your content. We implement the markup that transforms your site into a reliable source for AI.

[Contact Us](https://edgeangel.co/en/performance-acquisition/seo-geo-markup#contact)

Advanced Setup

GDPR Compliance

Ongoing Support

## The invisible code that makes all the difference

Structured Data Schema.org / JSON-LD

VALID

<script type="application/ld+json">

{

"@context" : "https://schema.org" ,

"@type" : "Organization" ,

"name" : "EdgeAngel" ,

"knowsAbout" : \[

"SEO" , "GEO" , "Data"

\]

}

</script>

Schemas détectés

Organization FAQPage Article BreadcrumbList

ARIA Roles

role="main"

role="navigation"

aria-label

aria-describedby

Rich Results

100%

Valid  
schemas

Structured markup is how you explain your content to robots. A well-marked site is understood 10x faster by AI, which maximizes your chances of being cited in their responses.

**Schema.org & JSON-LD** Describe your content (Organization, Article, FAQ, Product) in a format that machines instantly understand.

**WAI-ARIA** Structure your page so robots immediately identify main content vs chrome.

**Rich Results** Unlock Google rich snippets (FAQ, How-to, Reviews) that increase your CTR.

**LLM-Ready** Optimize your markup for LLMs that have a limited token budget to read you.

[Explorer nos services](https://edgeangel.co/en/performance-acquisition/seo-geo-markup#services-nav)

Structured Data Schema.org / JSON-LD

VALID

<script type="application/ld+json">

{

"@context" : "https://schema.org" ,

"@type" : "Organization" ,

"name" : "EdgeAngel" ,

"knowsAbout" : \[

"SEO" , "GEO" , "Data"

\]

}

</script>

Schemas détectés

Organization FAQPage Article BreadcrumbList

ARIA Roles

role="main"

role="navigation"

aria-label

aria-describedby

Rich Results

100%

Valid  
schemas

### Nos Certifications

## They trust us

## Our SEO & GEO Markup Services

01 / 03

-   01
    
    ### Existing Markup Audit
    
    Complete analysis of your structured data and technical accessibility of your site.
    
    -   Crawl and extraction: Scan of all your pages to identify existing Schema.org, errors and missed opportunities.
    -   Google Rich Results validation: Compliance test with Google requirements for rich snippets (FAQ, How-to, Product, Article...).
    -   ARIA audit: Verification of landmarks, roles and labels for screen reader accessibility AND LLMs.
    -   Competitive benchmark: Comparison of your markup with competitors to identify quick wins.
-   02
    
    ### Schema.org & JSON-LD Implementation
    
    Deployment of structured data adapted to your business and optimized for GEO.
    
    -   Schema Organization: Definition of your entity (name, logo, founder, knowsAbout) to strengthen your presence in the Knowledge Graph.
    -   Schema Article & FAQ: Markup of your editorial content to maximize your chances of appearing in Featured Snippets and AI responses.
    -   Schema Product & Offer: Complete e-commerce markup (price, availability, reviews) for Google Shopping rich results.
    -   Schema LocalBusiness: Optimization for local SEO and voice assistant responses.
-   03
    
    ### ARIA Standards & Web Performance
    
    Beyond visible markup, we optimize what robots read first.
    
    -   WAI-ARIA Landmarks: Implementation of roles (main, navigation, complementary) to structure your page for machines.
    -   Labels and descriptions: Adding aria-label and aria-describedby to give context to interactive elements.
    -   Core Web Vitals: Verification that markup doesn't negatively impact performance (Cumulative Layout Shift in particular).
    -   Testing and validation: Automated tests (Lighthouse, Wave) and manual to ensure compliance.

01

### Existing Markup Audit

Complete analysis of your structured data and technical accessibility of your site.

-   Crawl and extraction: Scan of all your pages to identify existing Schema.org, errors and missed opportunities.
-   Google Rich Results validation: Compliance test with Google requirements for rich snippets (FAQ, How-to, Product, Article...).
-   ARIA audit: Verification of landmarks, roles and labels for screen reader accessibility AND LLMs.
-   Competitive benchmark: Comparison of your markup with competitors to identify quick wins.

## The EdgeAngel Difference

01.

### AI, Data & Marketing  
Expertise

Essential for driving and optimizing marketing, maximizing performance, and limiting regulatory risks.

02.

### Premium  
Consultants

Responsive, proactive with solid and proven expertise in AI & digital marketing data (and we're nice!).

03.

### Personalized  
Collaboration

EdgeAngel adapts to your organization for a tailor-made and efficient collaboration.

## Your Markup & Structured Data experts

Engineers who master Schema.org, ARIA and semantic web standards

-   ### Olivier Chubilleau
    
    Expert en Data Engineering
    
    En tant que CEO et stratège SEO & GEO chez EdgeAngel, Olivier définit la vision de l'offre Generative Engine Optimization. Fort de 10 ans d'expérience à l'intersection de la Data et du Marketing, il pilote les projets les plus ambitieux et accompagne les directions marketing dans leur adaptation au nouveau paradigme du Search augmenté par l'IA.
    
-   ### Mathieu Lima
    
    Lead Technique Data Engineering
    
    Mathieu déploie l'infrastructure technique indispensable au SEO & GEO moderne. Expert en analyse de logs (Cloudflare, sGTM), il monitore le passage des robots IA (GPTBot, ClaudeBot) sur votre site et optimise l'architecture technique pour maximiser le budget de crawl et la digestibilité de vos contenus par les moteurs traditionnels comme génératifs.
    

💡 Small business or freelancer? [Discover our dedicated solution](https://edgeangel.co/en/performance-acquisition/essentials-tpe)

## Ready to accelerate your growth ?

Let's discuss your data and marketing challenges.  
We'll respond within 24 hours.

### Paul Schmitt

Consulting Director

"Our goal is to make your data actionable to generate concrete value, quickly."

[Or call us directly: +33 1 84 16 42 20](tel:+33184164220)

## Nos notes d'experts sur le sujet

[

Note d'expert

### Server-side tagging avec Google Tag Manager

Qu'est ce que GTM Server-side ? Comment s’intègre le Server-Side Tagging dans votre dispositif de collecte ? Quels sont concrètement les avantages et les limites actuelles ?

Lire la note →

](https://edgeangel.co/notes/server-side-tagging-avec-google-tag-manager)[

Note d'expert

### Google Consent Mode v2 : quelles nouveautés et quelles actions à mener ?

Google Consent Mode v2 est disponible : quelles fonctionnalités (ad\_user\_data, ad\_personalization, Basic et Advanced Consent Mode) pour Google Ads et Google Analytics.

Lire la note →

](https://edgeangel.co/notes/google-consent-mode-v2-essentiel-a-savoir)[

Note d'expert

### RGPD, CNIL et Analytics : Consent Mode et IA | 2026

RGPD, Consent Mode v2, DPF, AI Act : analyse factuelle du cadre réglementaire appliqué aux outils analytics et publicitaires. Grille de lecture annonceurs.

Lire la note →

](https://edgeangel.co/notes/dossier-rgpd-google-analytics-cnil)

## Questions?

LLMs (ChatGPT, Perplexity, Claude) must **understand quickly and unambiguously** the content of your pages. Schema.org provides them this structured understanding: "This is an Organization, it's called X, it's expert in Y". Without this markup, AI has to interpret everything from raw text, which increases the risk of errors and decreases your chances of being cited.

For GEO, the most impactful are: **Organization** (identity, knowsAbout), **FAQPage** (questions/answers extracted directly by AI), **Article** (author, date, E-E-A-T expertise) and **HowTo** (step-by-step tutorials). For e-commerce: **Product**, **Offer**, **Review**. For local: **LocalBusiness**.

**Schema.org** (via JSON-LD) describes the **content** of your page (what it is, who it is, what it's about). **ARIA** describes the **structure** of your interface (where is the menu, main content, sidebar). Both are complementary: Schema helps Google and LLMs understand meaning, ARIA helps them navigate and prioritize page areas.

LLMs have a **limited token budget** to read a page. ARIA landmarks (`role="main"`, `role="navigation"`) allow them to quickly identify main content vs chrome (menu, footer, sidebar). It's like giving them a map instead of letting them get lost in HTML. Less effort for AI = more chances of being well understood and cited.

Well-implemented JSON-LD has **virtually no impact** on performance because it's in the and doesn't block rendering. However, poor asynchronous loading of markup scripts can cause CLS (Cumulative Layout Shift) issues. We always validate Core Web Vitals after each implementation.

We use several tools: **Google Rich Results Test** (official validation), **Schema Markup Validator** (JSON-LD syntax), **Lighthouse** (ARIA accessibility) and **Wave** (complete accessibility). We test before deployment AND after to ensure there are no errors in production.

[Contactez nos experts](https://edgeangel.co/en/performance-acquisition/seo-geo-markup#contact)

## Découvrez nos autres expertises

Une suite complète d'outils pour maîtriser votre data

[

### Log Analysis

AI bot monitoring (GPTBot, ClaudeBot).

En savoir plus

](https://edgeangel.co/en/performance-acquisition/analyse-logs)[

### Position Tracking

Google rankings + LLM citations.

En savoir plus

](https://edgeangel.co/en/performance-acquisition/suivi-positions-seo-geo)[

### GTM Server-Side

Advanced tracking and Enhanced Conversions.

En savoir plus

](https://edgeangel.co/en/data-foundations/gtm-sgtm)[

### Google Analytics 4

SEO/GEO impact measurement.

En savoir plus

](https://edgeangel.co/en/data-foundations/google-analytics)

```json
{"@context":"https://schema.org","@type":"Organization","name":"EdgeAngel","url":"https://edgeangel.co","logo":"https://edgeangel.co/assets/brand/edgeangel-logo.svg","sameAs":["https://www.linkedin.com/company/edgeangel"],"contactPoint":{"@type":"ContactPoint","email":"hello@edgeangel.co","telephone":"+33 1 84 16 42 20","contactType":"customer service"}}
{"@context":"https://schema.org","@type":"Service","name":"SEO/GEO Markup: Schema.org, JSON-LD & ARIA for LLMs","description":"Optimize your markup for Google and generative AI. Schema.org, JSON-LD and ARIA standards implementation to maximize your chances of being cited by ChatGPT and Perplexity.","provider":{"@type":"Organization","name":"EdgeAngel","url":"https://edgeangel.co"},"areaServed":"France","url":"https://edgeangel.co/en/performance-acquisition/seo-geo-markup"}
{"@context":"https://schema.org","@type":"FAQPage","mainEntity":[{"@type":"Question","name":"Why is Schema.org markup essential for GEO?","acceptedAnswer":{"@type":"Answer","text":"LLMs (ChatGPT, Perplexity, Claude) must <strong>understand quickly and unambiguously</strong> the content of your pages. Schema.org provides them this structured understanding: \"This is an Organization, it's called X, it's expert in Y\". Without this markup, AI has to interpret everything from raw text, which increases the risk of errors and decreases your chances of being cited."}},{"@type":"Question","name":"What types of Schema do you recommend as priority?","acceptedAnswer":{"@type":"Answer","text":"For GEO, the most impactful are: <strong>Organization</strong> (identity, knowsAbout), <strong>FAQPage</strong> (questions/answers extracted directly by AI), <strong>Article</strong> (author, date, E-E-A-T expertise) and <strong>HowTo</strong> (step-by-step tutorials). For e-commerce: <strong>Product</strong>, <strong>Offer</strong>, <strong>Review</strong>. For local: <strong>LocalBusiness</strong>."}},{"@type":"Question","name":"What's the difference between Schema.org and ARIA?","acceptedAnswer":{"@type":"Answer","text":"<strong>Schema.org</strong> (via JSON-LD) describes the <strong>content</strong> of your page (what it is, who it is, what it's about). <strong>ARIA</strong> describes the <strong>structure</strong> of your interface (where is the menu, main content, sidebar). Both are complementary: Schema helps Google and LLMs understand meaning, ARIA helps them navigate and prioritize page areas."}},{"@type":"Question","name":"How does ARIA help AI robots?","acceptedAnswer":{"@type":"Answer","text":"LLMs have a <strong>limited token budget</strong> to read a page. ARIA landmarks (<code>role=\"main\"</code>, <code>role=\"navigation\"</code>) allow them to quickly identify main content vs chrome (menu, footer, sidebar). It's like giving them a map instead of letting them get lost in HTML. Less effort for AI = more chances of being well understood and cited."}},{"@type":"Question","name":"Does markup impact performance (Core Web Vitals)?","acceptedAnswer":{"@type":"Answer","text":"Well-implemented JSON-LD has <strong>virtually no impact</strong> on performance because it's in the <head> and doesn't block rendering. However, poor asynchronous loading of markup scripts can cause CLS (Cumulative Layout Shift) issues. We always validate Core Web Vitals after each implementation."}},{"@type":"Question","name":"How do you validate that markup is correct?","acceptedAnswer":{"@type":"Answer","text":"We use several tools: <strong>Google Rich Results Test</strong> (official validation), <strong>Schema Markup Validator</strong> (JSON-LD syntax), <strong>Lighthouse</strong> (ARIA accessibility) and <strong>Wave</strong> (complete accessibility). We test before deployment AND after to ensure there are no errors in production."}}]}
```