Any good papers or blog posts to understand GEO better?

Hey!

Recently, I have been very much interested in GEO optimization. For starters, I'd like to understand how AI Visibility and similar metrics are even calculated and analyzed by companies like Ahrefs.

For example, I understand that in the simplest approach, we can analyze just user prompts and track what brands/websites are mentioned/cited in LLM responses. Depending on that, we can calculate metrics like Visibility Score, number of mentions/citations, SoV, etc.

But more often I see that prompts are in fact clustered into topics. I believe the main goal is that a typical prompt might be too noisy and too small a data point to analyze and this is why we group them into larger entities, topics and then calculate metrics for the topics instead of individual prompts.

This is just my layman's understand of how such tools work, but apparently there are lots of cool tricks and approaches.

As far as I understand, there is also a relatively recent trend when SEO and GEO are unified and some combined metrics are introduced.

If you know any great papers or detailed blog posts on that, I'd really appreciate the recommendations.

Disclaimer: no LLMs used for writing or even proofreading this post. This is intentional because despite my great interest in the subject, I'd rather write everything myself, even at the cost of making mistakes.

Thanks!

Than