# DECA Playbook ## Docs - [AI CRM Rankings (Apr 26, 2026): HubSpot Holds #1, Microsoft Passes Zoho](https://decageo.ai/docs/ai-crm-rankings-apr-26-2026.md): This week's AI CRM ranking on ChatGPT: HubSpot #1 with a 100.0 DECA Score, Salesforce #2, Microsoft #3. See what AI recommends for CRM, refreshed weekly. - [Maddie's Note](https://decageo.ai/docs/deca/deca-sneak-peek/maddies-note.md): Building a GEO ranking product in public. Unfiltered stories from the front lines. - [Contact Us](https://decageo.ai/docs/deca/support-hub/contact.md): Get in touch with the DecaGEO team. We'd love to hear from you. - [Legal](https://decageo.ai/docs/deca/support-hub/legal.md) - [Plans & Pricing](https://decageo.ai/docs/deca/support-hub/plans-and-pricing.md): DecaGEO is currently free during our launch period. Explore AI brand visibility rankings at no cost. - [Changelog](https://decageo.ai/docs/deca/whats-new/changelog.md): Latest updates and releases from DecaGEO. - [Target Prompt Reverse-Engineering: Beyond Keywords for GEO](https://decageo.ai/docs/geo-playbook/geo-cheat-keys/advanced-tactics/geo-prompt-reverse-engineering.md): Stop optimizing for keywords. Learn to reverse-engineer user prompts and master the 'Query Fan-Out' mechanism to capture traffic from ChatGPT and Gemini. - [Medium vs. Website: The GEO Distribution Strategy for 2025](https://decageo.ai/docs/geo-playbook/geo-cheat-keys/advanced-tactics/geo-publishing-strategy-hub-spoke.md): Stop giving away your authority. Discover how to build a content ecosystem that prioritizes your domain as the Source of Truth while using platforms to amplify AI signals. - [The Context Lock Protocol: How to Force AI Citations](https://decageo.ai/docs/geo-playbook/geo-cheat-keys/fundamentals/geo-context-lock-protocol.md): Stop AI hallucinations. Learn the Context Lock Protocol—a 4-step formatting strategy (BLUF, Semantic HTML) to ensure ChatGPT and Perplexity quote your content accurately. - [Entity Optimization: The Foundation of GEO Strategy](https://decageo.ai/docs/geo-playbook/geo-cheat-keys/fundamentals/geo-entity-optimization.md): Move beyond keywords. Learn how Entity Optimization helps AI models recognize your brand as a distinct authority using the Knowledge Graph and JSON-LD. - [Why Your Domain Must Be the Source of Truth: Technical Authority in GEO](https://decageo.ai/docs/geo-playbook/geo-cheat-keys/fundamentals/geo-technical-authority-source-of-truth.md): AI cites sources it trusts. Learn why owning your domain is critical for Generative Engine Optimization and how to establish technical authority using Schema and Entity validation. - [The 3 Pillars of GEO: Trust, Context, and Structure](https://decageo.ai/docs/geo-playbook/geo-cheat-keys/fundamentals/the-3-pillars-of-GEO.md): A deep dive into the core methodology of Generative Engine Optimization. Learn how to optimize for Trust (Authority), Context (Semantics), and Structure (Machine Readability). - [What is GEO? The Definitive Guide](https://decageo.ai/docs/geo-playbook/geo-cheat-keys/fundamentals/what-is-geo.md): What is GEO? It’s your second chance at search visibility. Move beyond backlinks and domain authority learn how to build Answer-Ready Content that AI engines prefer and quote - [Getting Started with GEO: 5 Steps to AI Search Visibility](https://decageo.ai/docs/geo-playbook/geo-cheat-keys/getting-started/getting-started-with-GEO.md): Ready to rank in AI search? Follow this 5-step GEO(Generative Engine Optimization) roadmap. From content audit to entity optimization, learn exactly how to make your brand visible on Perplexity and Google SGE. - [Header Restructuring: Converting Creative Headers into Question-Based H2s for AI Parsing](https://decageo.ai/docs/geo-playbook/geo-cheat-keys/getting-started/header-restructuring-guide-ai-search.md): Learn how to convert creative, abstract headers into clear, question-based H2s to boost AI parsing, secure Featured Snippets, and align with Generative Engine Optimization (GEO) principles. - [List & Table Formatting: AI-Friendly Content with DECA GEO](https://decageo.ai/docs/geo-playbook/geo-cheat-keys/getting-started/list-table-formatting-ai-geo-deca.md): Transform unstructured text into AI-friendly lists & tables. Learn GEO best practices with DECA to optimize content for Featured Snippets, AI answers, and machine readability. - [The OSMU Workflow: Repurposing Content for AI Visibility](https://decageo.ai/docs/geo-playbook/geo-cheat-keys/getting-started/osmu-workflow-ai-visibility.md): Transform one asset into five AI-ready signals. Learn the One Source Multi Use strategy that leverages structured data, tables, and Q&A formats to dominate Generative Engine results. - [Schema Markup Injection: How to Add Speakable, FAQ, and Article Schema to Legacy Content](https://decageo.ai/docs/geo-playbook/geo-cheat-keys/getting-started/schema-markup-injection-geo.md): Learn how to inject Article, FAQPage, and Speakable schema markup into existing content to boost AI visibility, secure direct answers, and optimize for voice search without rewriting. - [The Spoke Strategy: Amplifying Authority via Medium & LinkedIn](https://decageo.ai/docs/geo-playbook/geo-cheat-keys/getting-started/spoke-strategy-medium-linkedin.md): Don't just copy-paste. Learn how to syndicate content on Medium and LinkedIn using canonical tags to boost your domain authority without SEO penalties. - [The Summary Box Tactic: Optimize for AI Direct Answers & LLM Citation](https://decageo.ai/docs/geo-playbook/geo-cheat-keys/getting-started/summary-box-tactic-ai-optimization.md): Learn how to craft effective summary boxes using details tags and FAQPage schema to boost AI search visibility, secure direct answers, and enhance LLM citation for your content. A practical guide for Generative Engine Optimization. - [The Technical Retrofit: How to Structure Legacy Content for AI Search](https://decageo.ai/docs/geo-playbook/geo-cheat-keys/getting-started/technical-retrofit-ai-parsing.md): Learn the 3-step technical retrofit process to make legacy content AI-readable. Master semantic HTML, summary boxes, and schema markup for GEO(Generative Engine Optimization). - [ How Tally.so Gained 9.6% Traffic from ChatGPT](https://decageo.ai/docs/geo-playbook/leaked-playbooks/industry-secrets/tally-geo-case-study-chatgpt-traffic.md): Discover how Tally.so reached $4M ARR and a 9.6% traffic share via ChatGPT. Learn the 3-step Generative Engine Optimization (GEO) strategy to replicate their success. - [2026 GEO Market Radar: A Strategic Roadmap for Digital Leaders | DECA](https://decageo.ai/docs/geo-playbook/market-radar/2026-trends/2026-GEO-Market-Radar.md): Go beyond SEO to GEO (Generative Engine Optimization). Discover 'Share of Model' the new success metric for the AI search era and a 3-step execution strategy for enterprises. - [Why Google Loves Reddit & How Brands Can Win](https://decageo.ai/docs/geo-playbook/market-radar/industry-analysis/reddit-content-void-strategy.md): Reddit ranks because your content is missing. Learn the Content Void theory and how to reclaim your brand authority using DECA's Target Prompt strategy. - [The GEO Playbook: Overview](https://decageo.ai/docs/geo-playbook/overview.md): Master GEO(Generative Engine Optimization) with actionable tactics, real case studies, and market intelligence. Your complete resource for winning at ChatGPT, Gemini, and AI search. - [The GEO Intelligence Hub](https://decageo.ai/docs/home.md): Learn GEO, track AI brand visibility, and stay ahead of the AI recommendation economy. - [Profound Drops 66.7% in AI Mentions (Apr 26)](https://decageo.ai/docs/profound-drops-ai-mentions-geo-apr-26.md): Profound just lost 66.7% of its AI mentions in 7 days. Semrush jumped 6 ranks to #1. See this week's GEO ranking and why AI visibility shifts weekly. ## OpenAPI Specs - [openapi](https://decageo.ai/docs/api-reference/openapi.json)