The citation index
Guides
Practical, sourced guides to answer engine optimization, how the AI engines choose what to cite, and how to be chosen.
- Published
- 07
- In research
- 00
- Engines covered
- 6
- Last updated
- July 2026
How to get cited by Google Gemini
How Gemini actually selects and shows sources, Ahrefs' fresh domain-citation data compared side-by-side with Google AI Overviews, and why the two don't reward the same pages despite sharing Google's technology.
How to rank in Google AI Overviews: get cited, not just #1
How Google's AI Overviews actually pick sources, the query fan-out mechanism, the real citation-overlap data, and three widely-repeated claims Google's own documentation contradicts.
How to get cited by Perplexity
Perplexity crawls continuously and rewards freshness, the engine-specific playbook, sourced from PerplexityBot's own docs and independent citation studies.
How to rank in ChatGPT & get cited by AI answers
How ChatGPT, Perplexity, Claude and other AI engines decide what to cite, and how to structure your content so they choose you.
How to measure your AI visibility: share-of-voice, not one score
What 'AI visibility' actually means, why the tools disagree on a single score, mentions vs. citations, per-engine methodology, and a free audit method that needs no tool.
How to get cited by Claude
How Claude's web search tool actually decides when to search and cite sources, why no Ahrefs-style domain-citation tracker covers Claude yet, and the real, sourced traffic-share data behind why it's worth planning for anyway.
How to get cited by Microsoft Copilot
How Microsoft Copilot actually decides to search Bing and cite sources, why it's the only major engine with its own public citation-analytics dashboard (Bing Webmaster Tools), and what its own most-cited-domains data shows about who really gets picked.
Reading about ranking? Compare the tools that track it →
AdvertiseCitedIndex guides are read by the people building AI-visibility tools, sponsor this page.See placements →