What Makes a Website SEO-Friendly? A Developer Explains A developer who builds Next.js and Laravel sites and handles post-build SEO work describes how a bug in his own portfolio's FAQ schema mislabeled project industries as countries, illustrating that SEO-friendliness is determined by construction decisions rather than plugins. He outlines practical rules for shallow site structure, stable URLs with redirects, semantic HTML, crawlability and indexability controls, and structured data, and reports that after rebuilding kamrandev.com, Google indexed all 32 pages within a week while Bing had crawled the domain only once during two years of a default WordPress install, leaving pages 'Discovered but not crawled' until he submitted the sitemap and pushed URLs through IndexNow. Last week I found a bug on my own portfolio. The About page had a FAQ answer that said I'd built websites "for businesses in Computer Vision, Portfolio, Professional Services and International Clients." Those aren't countries. My code was splitting each project's industry label on a dot and treating whatever came after it as a place. Google had already indexed the page, and that answer was sitting inside FAQ schema, ready for any AI assistant to quote. I fixed it in ten minutes. But it's a good example of what "SEO-friendly" actually means, because no plugin would have caught that. It was a construction decision, made badly, by me. So here's my working definition. A website is SEO-friendly when search engines can find every page, understand what each page is about, and serve it fast on a phone. Every part of that is decided while the site is being built. I build web apps and websites for a living, Next.js and Laravel mostly, WordPress when it's the right tool, and for two years I've also done the SEO work that comes after a build. Doing the second job is what taught me what the first job gets wrong. A good structure is shallow. Every page that matters should be reachable within about three clicks of the home page, related pages should sit together, and there should be one page per topic. Two pages about the same thing means Google picks one, and it's often not the one you wanted. URLs should mirror that structure and stay boring: /services/woocommerce-development/ /work/resumaic/ /insights/website-speed-and-seo/ The thing nobody tells you until it hurts: every URL you change later needs a redirect. I've watched a redesign lose a year of rankings because the agency rebuilt the site with new slugs and nobody mapped the old ones. That's not an SEO problem, it's a planning problem. Decide the structure before design starts and you never have to do the migration. Search engines read your HTML, not your screen. One h1 that says what the page is. h2 for the sections. A real nav . Real links. Alt text that actually describes the image.