The three jobs of SEO
Crawlability (bots can reach the page), relevance (the content matches what people ask), and authority (other trusted sites and AI systems reference it). Skip any one and the other two stop compounding.
On-page vs technical vs off-page
On-page is what a reader sees: titles, headings, copy, internal links. Technical is what a crawler sees: status codes, sitemaps, Core Web Vitals, structured data. Off-page is what other sites and AI models say about you.
How AI changed SEO
Answer engines summarize instead of listing links. Being cited now matters as much as ranking. Clear headings, factual claims, and schema markup make your page easier to quote.
What SEO is not
It is not keyword stuffing, it is not link-buying, and it is not one-off. It is a compounding maintenance discipline - most wins come from fixing existing pages, not launching new ones.