Classic keyword research finds the phrases people type into Google. AEO in large language models needs a different unit: the prompts people ask ChatGPT, Perplexity, and Gemini. This guide covers keyword research tools for AEO in LLMs, and how to turn prompts into content engines cite.
From Keywords to Prompts
AEO keyword research is prompt research. The prompts buyers ask a model are conversational, intent-heavy, and often phrased as full questions, not the clipped phrases people type into a search box. Keyword research for AEO maps that prompt space instead of a keyword list.
The starting move is a prompt inventory. Export the questions for your top seed keywords, then expand them with the follow-ups a model fans out into. A free AI visibility scan shows which of those prompts already name a competitor, so you research toward the gaps that matter.
“Keyword research for AEO is prompt research. The question a buyer asks is the unit now.”
The shift
What to Use, and How
Several approaches work together. People Also Ask and question-mapping tools surface the hierarchy of follow-up questions. Seed-keyword question exports give you a starting inventory. Prompt fan-out tools expand a seed prompt into the conversational sub-topics a model answers. None of these are magic; they are inputs to a prompt list you then prioritize by intent.
The background on how AI engines cite explains why entity-rich, question-led content wins these prompts. Build clusters around questions and entities, not isolated strings.
Turning Prompts into Citations
A prompt list is not a strategy until you prioritize it: lead with high-intent, comparison, and best-of prompts where being named drives a decision. Then publish answer-first content that directly answers each prompt, structured so an engine can lift it. Compare your tooling against the best AEO tools and weigh which ones track the prompts and help you act on them.
For product teams researching how buyers prompt, AEO for SaaS founders maps the prompt-to-pipeline path. Research the prompts, answer them, then track which answers start naming you.
Research the Questions, Then Answer Them
Keyword research tools for AEO in LLMs are most useful when they surface the real prompts buyers ask and feed a content plan you can act on. Build the prompt inventory, prioritize by intent, answer directly, then measure. Local brands can apply the same prompt research on a page like AI visibility for franchises.
The model rewards the page that answers the question fastest and most credibly. Find the question first, then earn the answer.
“Research the questions buyers actually ask the model, then be the answer.”
The method
Keyword research tools for AEO in LLMs work when they surface the real prompts buyers ask and feed a plan you can act on. Build the inventory, prioritize by intent, answer directly, then measure who gets named.
Authoritative references: Ahrefs research on search, Search Engine Land search coverage, and Search Engine Journal guidance.