SEO gets your content ranked on Google. AEO optimises for featured snippets and AI Overviews. GEO optimises for citations in AI tools like ChatGPT and Perplexity. All three use overlapping signals — E-E-A-T, structured data, entity clarity — and a complete strategy covers all three layers simultaneously.
Search has fractured. Three years ago, ranking number one on Google was the finish line. Today it is barely the starting gate.
Gartner analysts predict a 25% drop in traditional search engine volume by 2026, driven entirely by people redirecting queries to AI tools. ChatGPT alone processes 2.5 billion prompts daily, and 65% of those qualify as search behaviour. When someone asks an AI assistant a question you could have answered, your content either appears in the response or it does not. There is no page two.
This guide explains the three disciplines every content creator and marketer needs to understand in 2025: SEO, AEO and GEO. It covers how they differ, how they overlap, and exactly how DotTheta’s seven free tools help you execute all three without paying $140 a month for a tool that still only covers one layer.
What Is SEO and Why It Still Matters
Search Engine Optimisation is the practice of making your content discoverable and rankable in traditional search engines, primarily Google. It covers three pillars: technical health (site speed, crawlability, indexing), on-page signals (keywords, structure, content quality), and off-page authority (backlinks, entity recognition).
SEO is not dying. It is the foundation that makes AEO and GEO possible. You cannot get cited by an AI if your page cannot be indexed. You cannot win a featured snippet if your content is thin. The tools and signals that have always mattered, including E-E-A-T, topical authority, structured data, and page experience, are now more important than ever because AI systems consume and evaluate the same signals Google does.
What Is AEO: Answer Engine Optimisation
Answer Engine Optimisation is the practice of structuring content so that search engines and AI-assisted features can extract a direct answer from it. The targets are Google’s featured snippets, AI Overviews, People Also Ask boxes, knowledge panels, and voice assistant responses.
Featured snippets and AI Overviews now appear in nearly half of all Google searches. If you are not optimising for direct answer extraction, you are invisible in roughly half the search results being served.
What Is GEO: Generative Engine Optimisation
Generative Engine Optimisation is the practice of making your content authoritative, structured, and trustworthy enough to be cited in AI-generated responses across platforms that do not use traditional search ranking. The targets are ChatGPT, Perplexity, Claude, Gemini, and future AI-powered tools.
GEO extends AEO beyond Google. Research shows that traditional ranking factors for large language models differ significantly from Google’s. Being the top-ranking page does not guarantee citation in AI responses. Specific signals matter more: citing primary sources, using specific statistics, clear entity definition, author credibility, and content that matches conversational query patterns.
How SEO, AEO and GEO Work Together
The three disciplines are not competing approaches. They are layers of the same goal: visibility wherever people look for information.
SEO makes content findable and indexable. AEO makes it extractable for direct answers in Google’s ecosystem. GEO makes it citable in AI-generated responses outside Google. A page that does all three well appears in organic results, wins featured snippets, surfaces in AI Overviews, and gets cited by ChatGPT and Perplexity. Multiple touchpoints from a single piece of well-structured content.
DotTheta’s Seven Tools Across the SEO/AEO/GEO Stack
Keyword Hunter covers SEO keyword research: 150 or more ideas per seed, live difficulty scores, intent classification, semantic vocabulary analysis.
Outrank AI covers AEO content brief generation: NLP briefs from live SERP analysis, TF-IDF vocabulary extraction, PAA question mining, structured heading suggestions.
Trend Hunter covers GEO content angle discovery: cross-platform trend detection from Reddit, HackerNews and Google News to identify topics AI systems are currently discussing.
Serp Spy covers SEO competitor intelligence: live top-10 analysis, content gap identification, SERP feature mapping.
Tracer AI covers GEO entity research: AI-powered analysis of how your brand, competitors and topics are positioned across AI-generated content.
Prism SEO covers AEO/GEO scoring: 30-plus signal audit covering SEO, AEO and GEO readiness in a single report. The only free tool that scores all three.
AI Sentinel covers content quality and authenticity: 200-plus signal AI content detection, vocabulary fingerprinting, grammar pattern analysis, and cross-URL sitemap fingerprinting. Identifies content that triggers Google’s quality filters and provides replacement suggestions to humanise writing.
How to Build a Complete SEO/AEO/GEO Workflow for Free
Step one: use Keyword Hunter to find your target keyword and 8 to 10 supporting long-tail variations. Filter to keywords with difficulty below 30 and informational intent.
Step two: run the target keyword through Outrank AI. Use the PAA questions as H2/H3 headings. Use the TF-IDF vocabulary list as your NLP checklist during writing.
Step three: check Trend Hunter for current discussions on your topic. Find a recent data point or angle that gives your content fresh, citable specifics for GEO.
Step four: run your target keyword through Serp Spy. Identify what the top-10 pages are missing: questions they do not answer, sections they do not cover, schema they do not have.
Step five: before publishing, run your draft through AI Sentinel to check vocabulary patterns. After publishing, run the URL through Prism SEO and fix any AEO or GEO gaps before promoting the piece.
This workflow takes under 30 minutes for a standard article and costs nothing.
- Gartner predicts 25% drop in traditional search volume by 2026
- ChatGPT processes 2.5 billion prompts daily, 65% qualify as search
- AI Overviews have reduced CTR for top-ranking pages by 58% (Ahrefs)
- Featured snippets and AI Overviews appear in nearly half of all Google searches
- Semrush starts at $139.95/month, Ahrefs at $129/month
- DotTheta offers all six SEO/AEO/GEO tools free with no account required
