What SEO means
SEO — search engine optimization — is the work of making a website show up when people search for what it offers. It has three parts: content that answers real questions, technical health so search engines can read the site, and authority — other sites and signals that say you can be trusted. Get those right and you earn traffic you don't pay per click for.
How search engines decide
Google matches a query to pages it has crawled and ranks them by relevance and trust. Relevance comes from content that genuinely answers the intent; trust comes from a sound site and credible references. There's no single trick — it's the sum of doing the basics well over time.
Why SEO still matters in the AI era
AI answers from ChatGPT, Gemini and Google don't browse the whole web — they pull a short list from search and summarise it. So if you don't rank or aren't readable to search, you're invisible to AI too. SEO is the foundation that AI visibility is built on, not a thing it replaced.