Full Answer

The $20.9 billion projection covers purchases where an AI agent either completed the transaction directly (MCP-initiated orders through platforms like ChatGPT, Claude, or Perplexity) or provided the decisive product recommendation that led to an immediate purchase. It does not include purchases where AI merely assisted with product research without a direct conversion path — the number would be significantly larger under a broader attribution model.

For WooCommerce store owners, this figure matters because it quantifies a revenue channel most analytics setups cannot see. GA4's AI Assistant channel only detects a handful of AI referrer domains, so stores relying on standard reporting are blind to their share of this $20.9 billion. Server-side tracking that tags agent vs human purchases at the PHP order hook is the only way to measure your store's actual participation in agentic commerce (GDPR consent requirements for agent purchases).

The growth curve also has pricing implications. Shopify's data shows AI orders carry 14% higher AOV than human orders (Latency Studio / Shopify, 2026). If that premium holds across platforms, agent commerce is not just an incremental channel — it is a structurally higher-value one, and stores that cannot measure it are making bidding and inventory decisions without their best-performing cohort in the data.