How search engines actually work
To rank on Google, first understand Google
You cannot win a game without knowing its rules. So how does Google actually decide what to show? It happens in three steps: crawling, indexing, and ranking.
Step 1: Crawling — discovering pages
Google sends out little programs called bots (or "spiders") that follow links across the internet, page to page, discovering content. Think of a bot as a tireless reader clicking every link it can find.
If no link points to your page, the bot may never find it — which is why being linked to matters.
Step 2: Indexing — storing pages
When a bot reads a page, Google stores and organizes it in a giant library called the index. Being in the index means "Google knows you exist and what you are about". If a page is not indexed, it can never appear in results.
Step 3: Ranking — choosing the order
When someone searches, Google looks through its index and ranks the best matches in order. It weighs hundreds of signals — how relevant your content is, how fast and mobile-friendly your site is, how trustworthy it seems, and much more.
The rest of this course is really about sending Google strong signals at each step:
- help bots crawl you,
- get indexed,
- and send the signals that rank you higher.
A quick reality check
SEO is not instant. After you improve a page, it can take days or weeks for Google to re-crawl and update your ranking. SEO rewards patience and consistency — not overnight tricks.
Google works in 3 steps — crawl (find), index (store), rank (order). Every SEO task is just helping one of these steps.