GEO Guide · 45 articles
GEO — Generative Engine Optimization in Brazil
Definitions, taxonomy, methods, measurement, evidence and skepticism: how brands appear in ChatGPT, Claude, Perplexity and Google AI Overview. Published by murmur.marketing, which measures through browser captures with screenshots.
Taxonomy
AI Overview vs. Google AI Mode in 2026: two surfaces, two behaviors — murmur.marketing · GEO in Brazil
AI Overview is the generated block at the top of the classic results page; AI Mode is a separate conversational tab that uses query fan-out. This guide explains what they share, what Google says about eligibility and reporting, and why neither should be confused with the Gemini app.
Evidence
When an AI screenshot counts as evidence of results — murmur.marketing
Learn what an answer screenshot proves, which context it needs and how to connect captures to SOV progress.
Evidence
Brazilian study of which brands AI recommends in 2026 — murmur.marketing · GEO in Brazil
How to evaluate a Brazilian study of brands recommended by AI: nine transparency criteria, a comparison of public documents, and an example measurement with its method, denominator and limitations clearly stated.
Skepticism
Can you influence what ChatGPT recommends? Evidence, limits, and deception — murmur.marketing · GEO in Brazil
In a 2026-08-06 sample, the most-cited name appeared in 19 of 100 pairs and was absent in 81. These are historical findings, not a current SOV measurement; no one can choose an individual answer.
Skepticism
How to evaluate AI traffic and visibility figures — murmur.marketing
Use seven checks to assess AI research and reports: source, unit, denominator, period, surface, repetition and business relevance.
Taxonomy
Cited as a source or recommended by AI: the difference, and why it changes the diagnosis — murmur.marketing · GEO in Brazil
A direct answer to ‘what is the difference between being cited as a source and recommended by AI?’: they are distinct states within the same answer, with distinct remedies. The four levels I use to judge 800 captures, and why mention counts hide the first three.
Evidence
Does GEO have a documented success case in Brazil in 2026? — murmur.marketing · GEO in Brazil
How to assess a GEO case study: check its baseline, interventions, method, timeframe and change in Share of Voice. Review internal Fly Vet and Fly Med experiments, their limits and Murmur's SWAS model.
Method
Does llms.txt help you get cited by AI in 2026? What the specification says and no engine has confirmed — murmur.marketing · GEO in Brazil
Does llms.txt help you get cited by AI? No engine has confirmed using the file as a discovery channel, and the specification itself declines to prescribe how it should be processed. What server logs actually show being requested, and why publishing it anyway is defensible.
Measurement
GEO measurement through APIs or browsers: which to trust in 2026 — seven methodological criteria — murmur.marketing · GEO in Brazil
Compare API and browser-based GEO measurement across seven criteria: surface, session, capture evidence, repetition, execution date, coverage and limitations. Choose the method that matches the decision and track SOV over time.
Taxonomy
GEO, AEO and SEO: the difference, and what the market has not settled — murmur.marketing · GEO in Brazil
What is the difference between GEO, AEO and SEO? SEO competes for places in a list of links; AEO and GEO compete within the answer an engine writes. What is agreed, what is not, and murmur.marketing's taxonomy, explicitly labeled as its own rather than an industry standard.
Taxonomy
GEO, AIO or LLMO: which acronym to use in 2026 — murmur.marketing · GEO in Brazil
Which acronym should you use: GEO, AIO or LLMO? Use GEO: it has a traceable academic origin and is the one the Brazilian market consistently searches for. AIO is ambiguous, and AEO rarely stands alone in Brazil. This is a discovery decision, not a contest in conceptual precision.
Category
How ChatGPT search works in 2026: its stages, three crawlers, and what it does not do — murmur.marketing · GEO in Brazil
A direct answer to how ChatGPT search works: it issues a query, retrieves documents from a search index — with Bing as its stated grounding source — and writes an answer from the results. OpenAI's three user-agents, what the crawler does not execute, and why the API and chatgpt.com return different answers.
Method
How long does it take for an AI to cite your website? — murmur.marketing
Understand the milestones between publication and citation, how to measure first appearances and when to investigate access, content and identity.
Method
How many pages should you publish for AI visibility? — murmur.marketing
Plan GEO content around intent and evidence gaps, with priorities and criteria for evaluating each published batch.
Measurement
How many questions should you use to measure AI presence? — murmur.marketing
Size questions and repetitions by decision, intent and engine. Understand denominators, failures and comparable SOV measurements.
Category
How to allocate budget between SEO and GEO — murmur.marketing
Assess shared and incremental SEO and GEO investments through a baseline, execution plan, review criteria and SOV objective.
Measurement
How often should I measure my AI visibility in 2026? Cadence comes from measured noise — murmur.marketing · GEO in Brazil
A direct answer to ‘how often should I measure my AI visibility’: weekly to monitor, monthly to decide, and never daily without knowing your own noise floor. I ran the same 387 questions three days apart without changing anything — 98% returned the same verdict, which is where the scale comes from.
Method
How to appear in ChatGPT as a company: what works, in the right order — murmur.marketing · GEO in Brazil
A direct answer to ‘how to appear in ChatGPT as a company’: first be crawlable, then retrievable, then resolvable as an entity — and only then work on drafting. The order, what each stage requires, and why no honest person promises a timeframe.
Method
How to appear in Perplexity in 2026: the most explicit citation mechanics of the four engines — murmur.marketing · GEO in Brazil
How Perplexity’s visible citations help diagnose retrieval, why source inclusion is not the same as recommendation, how to verify crawler traffic, and how to measure SOV across engines as part of a sustained GEO strategy.
Measurement
How to build a question set to test my brand in ChatGPT in 2026 — eight columns and four roles — murmur.marketing · GEO in Brazil
Build a question set for AI visibility measurement with eight fields per row and four distinct roles. Separate prompts that name the brand from discovery questions, preserve denominators, and use the results to guide an ongoing SOV-growth strategy.
Evidence
How to evaluate a GEO company: results, SOV and guarantees — murmur.marketing
Learn how to evaluate a GEO operation: strategy to grow SOV, verifiable measurement, execution, SaaS tool limits and the terms behind contractual guarantees.
Method
How to be cited by ChatGPT and Perplexity in 2026: the four engines, one by one — murmur.marketing · GEO in Brazil
A direct answer to ‘how to be cited by ChatGPT and Perplexity’: there is no answer that works for both. The four engines measured on 2026-08-06 disagreed about the category’s leading name, and one named a company zero times that another named five out of five. What changes by engine, and what all four share.
Method
How to get my brand recommended by AI in 2026: the four conditions, in order — murmur.marketing · GEO in Brazil
How to earn AI recommendations: distinguish citation from endorsement, diagnose discovery, retrieval, entity and drafting, then connect measurement to interventions that can grow SOV over time. No universal timeline applies across brands or engines.
Measurement
I'm a CMO taking GEO to the board: how to justify it in 2026 — the argument is the denominator — murmur.marketing · GEO in Brazil
A direct answer for CMOs taking GEO to the board: what to leave out — projected ROI, promised deadlines and rates without denominators — the four category figures supporting an investment case, the baseline needed first, what to demand from a vendor, and what to declare unknown.