Found on Google.
Cited by AI.
Learn SEO, AEO and GEO from zero to specialist: the free, in-depth course for developers, marketers and founders who want their work to be found, in Google and in AI answers.
Free, no signup. 53 guides across 9 modules, with quizzes, free tools and a certificate of completion.
Nine modules. Zero to hero.
Work through them in order or jump to your level: every guide stands on its own, with code you can ship the same day.
01Foundations
How search works, from the first crawl to the rendered SERP.
- What is SEO?
- How Search Engines Work
- Anatomy of a SERP
Start here·8 guides
02Keyword Research
Find the queries worth winning and map them to content.
5 guides
03On-Page SEO
Optimize what's on the page: tags, content and links.
8 guides
04Technical SEO
Make your site fast, crawlable and unambiguous to machines.
9 guides
05Off-Page SEO
Authority, trust and reputation beyond your own domain.
4 guides
06Platforms & Surfaces
Rank beyond the ten blue links: YouTube, forums and Discover.
3 guides
07AEO
Answer Engine Optimization: win the answer, not just the rank.
3 guides
08GEO
Generative Engine Optimization: be the source AI cites.
4 guides
09Expert Practice
The work that separates specialists from practitioners.
9 guides
Free does not mean thin.
Search changed more in the last two years than in the ten before. Here is how this course keeps up, and how you can check.
Dated and kept current
Every guide shows when it was last reviewed. The whole course was refreshed for AI Overviews, AI Mode and the 2025-2026 updates on 5 October 2026.
See the changelogSources on every page
Claims are checked against Google's own documentation first, and each guide lists what it was checked against. No affiliate links, no sponsors.
Read the editorial policyPractice, not just reading
Each guide ends with questions that explain the answer. Track your progress, then pass the 30-question final exam for a certificate of completion.
Try the quizFree tools you will reuse
Preview how your title and description look in Google, and check which AI crawlers your robots.txt lets in.
Open the toolsQuestions, answered.
What is Rankyl?
Rankyl is a free online course that teaches SEO, AEO and GEO from beginner to expert: 53 guides in 9 modules, a glossary, free tools and a final exam. There is no signup, paywall or advertising.
What is the difference between SEO, AEO and GEO?
SEO (search engine optimization) earns rankings in classic results. AEO (answer engine optimization) earns the direct answer: featured snippets, People Also Ask and voice answers. GEO (generative engine optimization) earns citations in AI answers such as Google AI Overviews, AI Mode, ChatGPT and Perplexity. They build on the same foundations, which is why the course teaches them together. Start with GEO.
Do I need to know how to code?
No. Most guides need no code at all. Technical guides include copy-paste examples, and the technical SEO for developers learning path goes deeper for those who want it.
How long does the course take?
Most guides take 5 to 10 minutes to read. Working through every module takes most people a few weeks at a guide or two a day, and your progress saves in your browser as you go.
Is there a certificate?
Yes. Pass the 30-question final exam with 80% or more to get a free certificate of completion you can print or add to LinkedIn. It is a certificate of completion, not an accredited qualification.
Is the content up to date for 2026?
Every guide shows its last review date and sources, and changes are logged in the changelog. The latest refresh covers AI Overviews, AI Mode, AI crawlers and every confirmed Google update since January 2025.
Stop guessing. Start ranking.
A complete curriculum, zero cost. The only prerequisite is a website worth finding.