---
title: "The Citorum Journal"
slug: "articles"
canonical_path: "/articles"
meta_title: "Journal — Citorum"
meta_description: "Essays and research on Generative Engine Optimization across ChatGPT, Perplexity, Gemini, Claude, Copilot, and Google AI Overviews."
h1: "The Citorum Journal"
date: "2026-05-03"
---
<!-- key-facts -->
> **Title:** Journal — Citorum
>
> **Canonical URL:** https://trycitorum.com/articles
>
> **Description:** Essays and research on Generative Engine Optimization across ChatGPT, Perplexity, Gemini, Claude, Copilot, and Google AI Overviews.
>
> **Published:** 2026-05-03
<!-- /key-facts -->
# The Citorum Journal

**Direct Answer:** The Citorum journal covers Generative Engine Optimization — what it is, how it differs from SEO, which engines matter, and the citable-content patterns winning brands use to be quoted by ChatGPT, Perplexity, Gemini, Claude, Copilot, and Google AI Overviews.

## What you'll find here

The journal is editorial, not promotional. It documents how the answer era actually works: which engines retrieve from where, which content patterns get cited, which patterns do not, what GEO measurement should look like, and how to read a model's behavior without flattering yourself about why it changed.

We publish essays, methodology notes, and occasional teardowns of how a single prompt's answer changed across a week and which upstream source moved.

## Articles

- [What is Generative Engine Optimization (GEO)?](https://trycitorum.com/articles/geo/what-is-generative-engine-optimization.md) — The category-defining piece. How GEO differs from SEO, which engines matter, what gets cited, and what does not.
- [Share of citation, explained](https://trycitorum.com/articles/geo/share-of-citation-explained.md) — The closest GEO equivalent to share of voice. How it is measured, where it breaks, and how to read a movement.
- [How to write content ChatGPT will quote](https://trycitorum.com/articles/geo/how-to-write-content-chatgpt-will-quote.md) — A practical pattern for pages the answer engines actually cite: direct answer, sourced claims, prompt-shaped headings.
- [Why Reddit is a GEO surface](https://trycitorum.com/articles/geo/why-reddit-is-a-geo-surface.md) — Why ChatGPT, Perplexity, and Google AI Overviews lean on Reddit, and how to participate without burning the channel.
- [Perplexity vs Google AI Overviews](https://trycitorum.com/articles/geo/perplexity-vs-google-ai-overviews.md) — Two retrieval-heavy answer engines, two very different citation patterns. A side-by-side for brands measuring GEO.
- [The Citorum GEO Index methodology](https://trycitorum.com/articles/geo/the-citorum-geo-index-methodology.md) — The exact formula, weights, normalization, and quality controls behind the 0–100 composite score.

## Editorial standards

- Direct answer first. Every piece leads with a 35-to-70-word paragraph that resolves the question before any preamble.
- Sourced claims. Numbers, dates, named studies. We do not write adjective stacks.
- No promises about rank or citation. The engines do not work that way and we will not pretend they do.
- Updated when the engines change behavior. The journal is dated; older pieces stay as written for honesty about how the field moved.


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