GEO Research & Guides
Breakdowns of how AI search engines (ChatGPT, Perplexity, Gemini) find and pick sources, and what you can do on your site. We mark what is confirmed and what is not.
Updated:
GEO Research
Technical GEO · 7 min read
llms.txt Examples: 6 Real Files, and llms.txt vs llms-full.txt
Real files from llmstxt.org, Svelte, Vercel, Stripe, Cloudflare and Anthropic, the file’s structure, and what AI services officially say about reading it.
GEO Guide · 4 min read
GEO Audit: What a Website GEO Audit Checks and What It Costs
Six blocks of checks — bot access, text without JavaScript, Schema.org, visible FAQ, freshness, brand signals — and the file that fixes each.
Technical GEO · 8 min read
AI Crawlers Explained: GPTBot, ChatGPT-User, ClaudeBot, PerplexityBot
Three groups of AI bots — training, AI search, user requests — what happens if you block each, a table with vendor sources and ready robots.txt blocks.
Technical GEO · 6 min read
Chrome WebMCP: The Next Layer of AI Visibility After Schema.org
Chrome is developing WebMCP, a proposed standard for a website to declare its capabilities to AI agents. What it is, how far along it is, and what you can do now.
Tool Comparison · 6 min read
Causabi vs Profound: AI Visibility Tools — SMB and Enterprise (2026)
Profound is an AI search monitoring platform for large companies: a free 7-day trial, then Enterprise at a custom price. Causabi is for small businesses and agencies, with plans from $0 to $99 a month.
Tool Comparison · 7 min read
Causabi vs Otterly: Which AI Visibility Tool Is Right for You? (2026)
Both tools track mentions of your brand in AI answers. Pricing, coverage and features compared, from Otterly’s public pages, checked October 11, 2026.
GEO Guide · 12 min read
How to Optimize for AI Search in 2026: The Complete GEO Guide
A guide to Generative Engine Optimization: what makes a site readable to AI, what is not proven yet, and how to check.
AI Search Visibility · 9 min read
Why ChatGPT Doesn’t Mention Your Business (and What to Check)
If ChatGPT, Gemini or Grok don’t mention your business, the cause may be your site. A checklist of five checks.
AI Search Visibility · 9 min read
Most Google AI Overview Citations Come From Outside the Top 10 — And What to Do About It
According to BrightEdge (February 2026), only about 17% of sources cited in Google AI Overviews also rank in the organic top 10; Ahrefs (March 2026) found 38%. What that may mean for SEO and how to make pages readable for AI.
AI Search Visibility · 8 min read
AI Search Traffic and Conversion: What the Data Says and How to Measure It
In a Seer Interactive study (2025, one client) visits from ChatGPT converted better than Google organic while making up a small share of traffic; another study found the opposite. What is known and how to measure it on your own site in GA4.
AI Search Engines · 10 min read
ChatGPT and Perplexity Cite Different Sites: What Is Known About Source Overlap
In Profound’s 2025 study, the domains ChatGPT and Perplexity link to overlap by only 11%. What that may mean and what you can do on your site for each platform.
GEO Guide · 6 min read
Google’s AI Optimization Guide: What It Actually Says (And What to Do)
A walkthrough of Google’s guidance on its AI search features (AI Overviews, AI Mode): what it recommends, what it says is unnecessary, and what you can do on your site.
Schema & Structured Data · 8 min read
FAQ Schema and AI Citations: What the Markup Does, What We Know, How to Add It
What FAQPage JSON-LD markup does, what public sources say about it, and what is still unknown. Code example and rules for writing the answers.
AI Search Engines · 10 min read
How ChatGPT, Perplexity, and Gemini Decide Which Sites to Cite
A technical breakdown of how AI search engines find and select sources: OpenAI Responses API, Perplexity Sonar and Gemini AI Overviews.
Technical GEO · 7 min read
The Complete Guide to llms.txt: How to Prepare Your Site for AI Agents
llms.txt is a proposed format for a site summary file aimed at AI agents. How it is structured and what to include. There is no evidence that major assistants read it.
SaaS Growth
Build in Public · 4 min read
AI Visibility Where You Already Work
What shipped this week: a critical WordPress onboarding fix, a GitHub Action that posts your AI score in the PR, and a free no-website audit for local businesses.
Product Update · 7 min read
What’s new in the AI score: prices, hedging, freshness — lessons from a 252k-trial study
We updated the scoring model per the SIGIR 2026 study: a bonus for explicit prices, a penalty for hedged wording, more weight on freshness, three AI crawler classes. And what did not change.
Google Updates · 8 min read
Google Lighthouse Now Checks Your Site for AI Agents — Here’s What Changed
Google released Lighthouse Agentic Browsing, an experimental audit of how ready a site is for AI agents. It checks WebMCP tools, the accessibility tree, layout stability and llms.txt.
Google Updates · 6 min read
Google I/O 2026: AI Mode Hits 1 Billion Users — What It Means for Your Business
What Google announced about AI Mode at I/O 2026, what is reported about clicks to websites, and what a site owner can check.
Google Updates · 6 min read
Google I/O 2026 for Shopify Stores: What Changed and What to Check
Google said at I/O 2026 that AI Mode has more than 1 billion monthly users. What it means for a Shopify store and what you can check so AI reads your catalog better.
Google Updates · 6 min read
Google I/O 2026 for WordPress Sites: What Changed and What to Check
Google said at I/O 2026 that AI Mode has more than 1B monthly users. What a WordPress site owner can check so AI reads the site better.