# GEO Knowledge Base > Expert guides by audit zone to understand, measure, and fix every AI-commerce signal on Shopify. - Canonical HTML: https://verityscore.io/en/kb/ - Markdown alternate: https://verityscore.io/en/kb.md - Language: en - Updated: 2026-04-28 ## Critical Blocking issues for AI visibility. - [What is Agentic Commerce? Complete Guide 2026](https://verityscore.io/en/kb/what-is-agentic-commerce/) : GEO: Autonomous AI agents search, compare, and buy for consumers. Understand ACP, UCP, and how to prepare your Shopify store. - [Schema.org Product for Shopify Stores](https://verityscore.io/en/kb/schema-org/) : Schema.org: 12 required fields, 8 common mistakes, and how schema.org directly impacts AI recommendations. Validation checklist for Shopify merchants. - [LLM Landscape: 15 AI Systems in 2026](https://verityscore.io/en/kb/llm-landscape-ecommerce/) : AI Landscape: Beyond ChatGPT and Perplexity: Mistral, Claude, Gemini, Meta AI, Grok, DeepSeek, and MCP agents. Who reads what, how to appear everywhere. - [robots.txt: AI Crawler Access for Shopify](https://verityscore.io/en/kb/robots-crawlers/) : Robots.txt: Your Shopify robots.txt may block ChatGPT and Perplexity from seeing your products. How to separate search, user, training, and ads-validation bots. - [AggregateRating: Make Reviews AI-Readable](https://verityscore.io/en/kb/aggregate-rating/) : Reviews: Are your Loox, Judge.me, Yotpo reviews readable by ChatGPT, Perplexity, Mistral? Analysis per app, per AI crawler, and server-side fix paths. - [GEO Audit: Shopify AI Visibility Check](https://verityscore.io/en/kb/geo-audit/) : GEO: What a GEO audit checks: the 4 pillars and 9 factors that decide whether ChatGPT, Perplexity and Google AI recommend your Shopify store. - [Get Shopify Products Into ChatGPT Shopping](https://verityscore.io/en/kb/sell-on-chatgpt-shopify/) : Agentic Commerce: ChatGPT is now a sales channel for Shopify. See the 8 criteria that make your products readable, citable and ready for Agentic Storefronts in 2026. - [ACP: Sell Through ChatGPT Agents on Shopify](https://verityscore.io/en/kb/acp-agentic-commerce-protocol/) : ACP: How ACP powers ChatGPT Shopping and autonomous purchasing. Enable it on Shopify, audit your readiness, ACP vs UCP compared. - [Shopify UCP: Catalog MCP Audit Guide](https://verityscore.io/en/kb/ucp-universal-commerce-protocol/) : UCP: Set up /api/ucp/mcp, test search_catalog and lookup_catalog, and verify Shopify catalog consistency before AI agents use it. - [Build a Branded ChatGPT App for Shopify](https://verityscore.io/en/kb/chatgpt-app-shopify/) : Agentic Commerce: ChatGPT Shopping lists you next to rivals. A branded ChatGPT App gives your Shopify store its own space: setup steps, costs, examples. - [Optimize Your Shopify Product Page for AI](https://verityscore.io/en/kb/optimize-shopify-product-page-ai/) : Schema.org: A surgical guide: schema.org Product, price and stock in HTML, INCI/specs, structured reviews, citable copy. What AI actually reads on your Shopify pages. ## High priority Important signals to fix for maximum recommendability. - [GEO Readiness: 9 AI Visibility Factors](https://verityscore.io/en/kb/geo-readiness/) : GEO: Your GEO Score measures how visible your Shopify store is to ChatGPT, Perplexity, and Google AI. 9 factors explained with optimization tips. - [Agentic Storefronts Not Available? 4 Fixes](https://verityscore.io/en/kb/shopify-agentic-storefronts-eligibility/) : agentic-commerce: Seeing 'Agentic storefronts aren't available' in Shopify? Meet the 4 official criteria (US sales, Catalog, terms, policies) to reach ChatGPT and Google AI. - [AI Buyer Score: The Shopping Agent Checklist](https://verityscore.io/en/kb/ai-buyer-score/) : AI Buyer: How an AI shopping agent evaluates your Shopify store. The 9 recommendability criteria and how to go from 'not recommended' to 'recommended'. - [Chrome Skills: Google AI Comparator 2026](https://verityscore.io/en/kb/chrome-skills-shopify/) : AI Visibility: Step-by-step guide to enable Chrome Skills, create reusable Gemini prompts, and understand what it means for your Shopify store's AI visibility. - [GEO vs SEO: What's the Difference for E-commerce?](https://verityscore.io/en/kb/geo-vs-seo/) : GEO: SEO optimizes for blue links, GEO for AI answers. Differences, complementarities, and why GEO is essential for Shopify merchants in 2026. - [Golden Record: Product Data for AI Commerce](https://verityscore.io/en/kb/golden-record/) : Scoring: The Golden Record measures 34 product attributes across 7 categories. At 95%+, your AI visibility multiplies 3-4x. Complete checklist inside. - [AEO vs GEO vs SEO: clarifying the acronyms in 2026](https://verityscore.io/en/kb/aeo-vs-geo-vs-seo/) : AEO: AEO, GEO, SEO: what each term really covers, what overlaps, what diverges. Sourced comparison table with Q1 2026 numbers. - [Make AI Trust Your Product Claims](https://verityscore.io/en/kb/claims-proof/) : Claims: AI ranks unverified claims as less reliable. Find which Shopify shipping, guarantee, and quality claims need structured proof with a free audit. - [Google AI 2026: What Your Store Needs](https://verityscore.io/en/kb/google-ai-ecommerce-updates/) : GEO: AI Overviews hit 2.5 billion users. AI Mode passed one billion. Google rebuilt search for stores between 2025 and 2026: what changed and what to do. - [Multi-market Price Drift on Shopify](https://verityscore.io/en/kb/multi-market-price-drift/) : Multi-market: When your EUR price doesn't match your GBP/USD price coherently, ChatGPT Shopping, Perplexity Buy and Google AI Mode downrank your products. How to detect and fix on the Shopify Markets side. - [E-E-A-T Signals for AI: How Agents Evaluate Trust](https://verityscore.io/en/kb/eeat-signals-ai/) : Trust: AI agents evaluate your store like Google evaluates E-E-A-T. Discover the trust signals that determine whether AI recommends your products. - [Perplexity Shopping for Shopify: Get Listed](https://verityscore.io/en/kb/perplexity-shopping/) : Perplexity: Why your Shopify products are missing from Perplexity Shopping, the 7 signals AI checks, and how to get listed. Free readiness score, no email. - [Pricing: How AI Agents Compare Products](https://verityscore.io/en/kb/pricing-ai-visibility/) : Commerce: AI agents compare prices before recommending. Expose your pricing, promotions, and compareAtPrice for ChatGPT Shopping, Perplexity, and Google AI. ## Optimization Improvements that strengthen AI agent trust. - [llms.txt for Shopify: Worth Adding?](https://verityscore.io/en/kb/llms-txt/) : llms.txt: llms.txt maps your Shopify content for AI systems, but schema.org, sitemaps and HTML still drive more visibility. Learn what to prioritize. - [Conversational Content: Writing for Humans AND AI](https://verityscore.io/en/kb/conversational-content/) : Content: How to structure Shopify product content so it answers buyer questions, stays engaging for humans, and gives AI agents the facts they cite and recommend. - [Shipping & Returns: Critical Trust Signals](https://verityscore.io/en/kb/shipping-returns/) : Policies: Shipping and return policies are major trust signals for AI shopping agents. How to make them visible, structured and verifiable on your Shopify store.