SEO FUNDAMENTALS
What Is SEO and How Does Google Search Work?
SEO gets talked about as if it's one thing. In practice it's three separate jobs — getting found, getting understood, and getting chosen — and most confusion about SEO comes from mixing them up.
Written & Reviewed by Vijayraj Nadar
Sep 24, 2026 • 6 min read
Key Takeaways
- Crawling, indexing and ranking are three distinct stages — diagnose problems in that order.
- A page can be well-written and still rank poorly if it isn't properly crawled or indexed.
- Search intent influences ranking as much as content quality does.
Crawling: getting found
- Bots follow links from page to page to discover new or updated content
- A page with no inbound links is effectively invisible at this stage
- Blocking a page via robots.txt or a login wall stops crawling entirely
- No amount of good writing helps if the crawler never reaches the page
Indexing: getting understood
- The index is the database search engines actually query — crawling alone doesn't guarantee a spot in it
- Thin or duplicate content can keep a crawled page out of the index
- A stray noindex tag is a common, easy-to-miss cause of missing pages
Ranking: getting chosen
- Ranking is the ordering of indexed pages for a given query — what most people mean by SEO
- Relevance, content quality, site authority and user experience all factor in
- Search intent matters as much as optimization: Google won't surface a product page for someone who wants to learn, however well the page is built
Why the distinction matters
- Treating SEO as one lever wastes effort — e.g. polishing copy on a page that isn't even indexed
- When a page underperforms, check crawling, then indexing, then ranking — in that order