SEO & webmaster guides

Practical guides written to be used, not skimmed — each one paired with a free tool so you can check your own site as you read.

Does AI Content Hurt Your SEO? An Honest Answer Does AI content hurt your SEO? No — Google rewards helpful content, not human-vs-AI. What decides rankings, and how to make AI drafts genuinely good. AI Visibility · 4 min read Open Graph Tags: A Complete Guide with Examples A complete guide to Open Graph tags: what og:title, og:description and og:image do, the exact code to add, image sizes, and how to test your link previews. SEO · 4 min read HTTP Security Headers: A Practical Guide A practical guide to HTTP security headers: HSTS, Content-Security-Policy, X-Content-Type-Options, X-Frame-Options, Referrer-Policy and Permissions-Policy. Website · 3 min read What Is llms.txt? Format, Status and When to Use It What llms.txt is: the llmstxt.org proposal, its Markdown format, llms-full.txt, its honest status with Google and AI tools, and how to create a useful one. AI Visibility · 5 min read What Is Crawl Budget and How to Optimize It What crawl budget is, when it actually matters, and a practical checklist to stop search engines wasting it on redirects, errors and low-value URLs. Technical SEO · 4 min read What Is a Backlink? A Plain-English Guide What a backlink is, how dofollow, nofollow, sponsored and ugc links differ, what Google treats as link spam, and how to earn backlinks that last. Backlinks · 7 min read SSL Certificate Errors: How to Diagnose and Fix Them Fix SSL certificate errors step by step: expired, self-signed, name mismatch, missing intermediate, untrusted CA, mixed content and HSTS, plus auto-renewal. Domain · 7 min read SEO Audit Checklist: A Practical Step-by-Step Guide A practical SEO audit checklist: crawlability, indexability, on-page tags, technical health, Core Web Vitals, structured data, internal links and AI readiness. SEO · 6 min read Schema Markup Guide: JSON-LD, Types and Testing A practical schema markup guide: JSON-LD vs Microdata vs RDFa, common types, required properties, @graph, testing tools, Google's guidelines and FAQ changes. SEO · 6 min read Robots.txt Guide: Syntax, Rules and Common Mistakes A practical robots.txt guide: RFC 9309 syntax, groups, Allow and Disallow, wildcards, the longest-match rule, sitemaps, and the mistakes that hurt SEO. Technical SEO · 6 min read Meta Tags for SEO: What Still Matters Which meta tags still matter for SEO: title, meta description, robots, canonical, viewport, charset, hreflang and Open Graph, plus the tags Google ignores. SEO · 7 min read The Keyword Density Myth: What Matters Instead Keyword density isn't a Google ranking factor. Learn where the myth came from, what Google says, what matters instead, and how to use a density check sensibly. Keywords · 5 min read