# CiteLab > Practical GEO (Generative Engine Optimization) practices for optimizing your content for AI search engines like ChatGPT, Perplexity, and Google AI Overviews. ## GEO Practices - [AI Citation Signals — What Makes LLMs Trust Your Content](https://citelab-eks.pages.dev/learn/ai-citation-signals): AI search engines select citation sources based on brand mentions, structured data, and topical authority — not traditional backlinks alone. - [Brand Mentions Are 3x Stronger Than Backlinks for AI Citations](https://citelab-eks.pages.dev/learn/brand-mentions-vs-backlinks): Ahrefs 2026 study of 75K brands found brand web mentions have 0.664 correlation with AI citations vs 0.218 for backlinks — earned media outperforms link building. - [What Is Generative Engine Optimization (GEO)?](https://citelab-eks.pages.dev/learn/what-is-geo): GEO is the practice of optimizing content to be cited by AI search engines like ChatGPT, Perplexity, and Google AI Overviews — distinct from traditional SEO.