332 practical guides to website speed, SEO, email deliverability, DNS, security and automation, with fixes you can copy and paste.
The first 200-day TLS certificates issued since March 2026 are now expiring. How websites should automate renewal before the 100-day cap in March 2027.
Why DNS changes take time to show up, what TTL really controls, and a step-by-step plan for changing records or nameservers without downtime or lost email.
The three types of Core Web Vitals explained: what LCP, INP and CLS measure, current good and poor thresholds, the 75th percentile rule and field vs lab data.
How clickjacking works, how X-Frame-Options and CSP frame-ancestors differ, which takes precedence, and configs for Nginx, Apache and Cloudflare.
Find broken internal links, soft 404s and redirect chains, then fix them with copy-paste Apache and Nginx rules that send users and Googlebot in one hop.
An honest comparison of free website audit tools: PageSpeed Insights, GTmetrix, Lighthouse, Search Console, MXToolbox, Security Headers, SSL Labs and more.
Get your brand logo next to your emails with BIMI: DMARC enforcement, VMC vs CMC certificates, SVG Tiny PS logo rules and the exact DNS record to publish.
Learn what a CAA record does, how certificate authorities check it, and how to set CAA records for Let's Encrypt, Cloudflare and AWS without breaking renewals.
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