# ItemList Schema for AEO: Complete Guide | AEO.page > Learn how to implement ItemList schema for Answer Engine Optimization. Boost AI citations on ChatGPT, Perplexity, and Gemini with ItemList Schema. ## What is ItemList Schema? Defines an ordered or unordered list of items, useful for rankings, top-N lists, and curated collections. In the context of Answer Engine Optimization (AEO), ItemList schema provides the structured data that AI search engines need to understand, extract, and cite your content. Without it, AI engines must guess at your content's meaning — with it, you give them a clear signal that dramatically increases your chances of being cited in AI-generated answers. ### AEO Impact: Medium — AI engines frequently reference list-style content for recommendation queries, and ItemList schema helps them parse ranked items accurately. Use our free AEO audit tool to check if your site already implements ItemList schema correctly. ## Best Used For ItemList schema delivers the strongest AEO results when applied to these content types: - Top 10 lists - Product rankings - Resource directories - Curated collections Not sure which schema types your site needs? Take our AEO readiness quiz for personalized recommendations. ## Supported AI Platforms ItemList schema is recognized and utilized by these AI search platforms for generating answers and citations: ChatGPT Perplexity Gemini AI Overviews Learn about the differences between platforms in our ChatGPT vs Perplexity comparison. ## Code Example Here is a ready-to-use JSON-LD implementation of ItemList schema. Copy this into a