Reference
The Language Commerce Glossary
The vocabulary of AI mediated commerce, defined precisely and kept current. Each term links to a full explainer with evidence, examples, and common questions. Last updated August 2026.
Commerce mediated by language interfaces: AI assistants, answer engines, and shopping agents. The umbrella category.
AI agents autonomously executing shopping tasks and transactions on a consumer's behalf.
The OpenAI and Stripe open standard for agent-initiated checkout. AP2 is Google's payments counterpart.
Autonomous systems that search, compare, decide, and buy on a shopper's behalf.
The practice of earning presence in AI generated answers across ChatGPT, Claude, Gemini, and Perplexity.
The full optimization discipline for generative engines: visibility, accuracy, sentiment, and competitive position.
The measurable presence, prominence, and accuracy of a brand across AI answer surfaces.
The percentage of relevant AI generated answers in which a brand appears. The successor metric to share of voice.