What is Structured Data?

Definition

Structured data is machine-readable metadata added to web pages that explicitly describes the content's meaning, type, and attributes using standardized vocabularies — primarily Schema.org. While humans read a product page and understand it's selling a $49/month analytics tool, machines need structured data to parse that same information reliably. Structured data bridges the gap between human-readable content and machine comprehension.

Why structured data matters for AEO

Structured data has been important for SEO for years (enabling rich snippets, knowledge panels, etc.), but its value for AEO is even greater:

• Unambiguous entity identification — Tells AI exactly what your brand is, what you sell, and how you're categorized
• Google Knowledge Graph — Structured data feeds Google's Knowledge Graph, which powers AI Overviews
• Accurate AI representation — Reduces hallucination risk by providing explicit facts
• Enhanced citations — Pages with structured data are more likely to be selected as authoritative sources

Common structured data types for AEO

| Schema type | What it describes | AEO impact | |-------------|------------------|------------| | Organization | Your company identity | Core brand recognition | | Product | Individual products/services | Product recommendations | | FAQPage | Frequently asked questions | Direct answer mapping | | Article | Blog posts and content | Content authority signals | | HowTo | Step-by-step instructions | Procedural answer matching | | Review / AggregateRating | Customer ratings | Sentiment and social proof | | BreadcrumbList | Site navigation path | Content hierarchy understanding |

Structured data formats

Three formats exist for implementing structured data:

1. JSON-LD — A JavaScript object in a <script> tag. Google's recommended format. Easiest to implement and maintain, completely separate from HTML markup.
2. Microdata — HTML attributes added directly to content elements. Harder to maintain and more error-prone.
3. RDFa — Similar to Microdata but uses different attribute names. Less commonly used.

For AEO purposes, always use JSON-LD. It's cleanest, best supported, and recommended by Google.

Quick implementation checklist

• Add Organization schema to your homepage
• Add Product schema to every product/pricing page
• Add FAQPage schema to FAQ sections
• Add Article schema to blog posts and guides
• Validate with Google's Rich Results Test

Related terms

• JSON-LD — The preferred format for implementing structured data
• Content Extractability — How easily AI systems can parse your page content
• Answer Engine Optimization (AEO) — The practice of optimizing for AI answers

Tools

• JSON-LD Generator — Free tool to generate structured data markup
• AEO Score checker — Check whether your pages have proper structured data