GEO glossary

Semantic HTML

Semantic HTML is hTML elements used according to their meaning and document role.

Why this matters for GEO

Well-structured headings and text support machine interpretation.

Related terms

• Content Chunk
• Heading Hierarchy
• Extractable Passage
• Structured Data
• Answer-First Content
• Schema.org Vocabulary

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• Content Chunk
• Heading Hierarchy

All 150 GEO and AI visibility terms

Updated November 2026.