How Search Engines Work

Taught by Pip

Ahoy — Pip here, your lighthouse keeper. You type a few words, press enter, and in less than a second the whole web hands you ten useful pages. That feels like magic. It isn't. It's a tidy chain of plain, sensible steps, and by the end of this course you'll be able to picture every one.

We'll walk it slowly. How a search engine wanders the web reading pages. How it files what it finds into a giant index. How it sorts that index to put the best answer on top. Then how you can ask sharper questions and read results with a clear eye — and what "SEO" really means, minus the hype.

No code, no jargon, no overwhelm. Just a steady beacon. 🔦

1. What a Search Engine Really Is Free previewA search engine isn't searching the live web when you type — it's searching a giant pre-made copy. Meet the three jobs behind every result.
2. Crawling: How the Web Gets Read 🔒A crawler is a program that reads a page, follows its links to new pages, and repeats — quietly mapping the web one link at a time.
3. Indexing: Filing the Whole Web 🔒An index flips the web inside-out — instead of pages listing their words, it lists each word and every page that contains it. That's the trick to instant search.
4. Ranking: Choosing the Best Answer 🔒Out of millions of matching pages, ranking picks the order. It weighs relevance, quality, and trust — many signals blended into one quiet judgment.
5. Searching Smarter: Asking Better Questions 🔒A handful of simple habits — better words, quotes, minus signs, and site limits — turn a vague search into a precise one. Here's the toolkit.
6. SEO in Plain English 🔒SEO is just helping a search engine understand and trust your page so the right people find it. The honest version is mostly making a genuinely good page.
7. The Whole Journey, Click to Answer 🔒We trace one search end to end — crawl, index, rank, your query, the result — then build a shareable Search Field Guide to prove you've got it.