All terms

The 2026 vocabulary of Generative Engine Optimization, with live per-term citation status across ChatGPT, Perplexity, Claude, and Copilot.

A

foundational
AI Overview
AI Overview is Google's generative search feature that produces AI-synthesized answers at the top of results, citing multiple sources. It is the 2024 rename and rollout of Search Generative Experience (SGE).
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foundational
AI Search Optimization
AI Search Optimization (AIO) is the umbrella term for optimizing content visibility across all AI-driven search surfaces: generative engines, answer engines, and emerging agentic browse experiences.
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B

foundational
BreadcrumbList Schema
BreadcrumbList (schema.org/BreadcrumbList) is the JSON-LD type that declares a page's position in the site hierarchy. It powers Google's breadcrumb rich result in the SERP and can provide machine-readable site-hierarchy context where systems parse structured data.
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S

foundational
Search Generative Experience (SGE)
Search Generative Experience (SGE) was Google's labs-stage AI search feature launched in May 2023, the precursor to AI Overview. Renamed and graduated to AI Overview at Google I/O in May 2024.
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T

foundational
Topic clusters
Topic clusters are a content architecture pattern: one pillar page covers a topic broadly, multiple spoke pages drill into sub-topics, all interlinked. Originated as classic SEO methodology; increasingly adapted for AI-search topic coverage, entity clarity, and retrieval-friendly content organization.
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