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2026/08/06 · 8分で読めますHTTP Security Headers Explained: What Each One Does
A plain-English guide to HSTS, CSP, X-Frame-Options, X-Content-Type-Options, Referrer-Policy and Permissions-Policy, with safe starting values for each.
2026/08/06 · 8分で読めますHow to Find and Fix Broken Links on Your Website
Broken links waste visitors' time and crawlers' effort. Learn how to find broken internal and external links, decide how to fix each one and…
2026/08/05 · 7分で読めますInteraction to Next Paint (INP): How to Fix Slow Interactions
INP measures how fast your page reacts to taps and clicks. Learn what causes poor INP, how to find the slow interaction and which…
2026/08/05 · 8分で読めますSPF vs DKIM vs DMARC: What Each One Does and Why You Need All
SPF, DKIM and DMARC solve different parts of e-mail trust. See what each checks, how they work together and in which order to set…
2026/08/05 · 8分で読めますMixed Content Errors: How to Find and Fix Them on Your Site
Mixed content breaks the padlock and blocks scripts on HTTPS pages. Learn how to find every insecure resource and fix it for good on…
2026/08/05 · 8分で読めますWriting Image Alt Text: A Practical Checklist for Your Site
What image alt text is, why search engines and screen readers need it, how to write good alt text with examples, and when an…
2026/08/04 · 7分で読めますHow to Fix Cumulative Layout Shift (CLS) on Your Website
Content that jumps while loading hurts trust and clicks. Learn what causes Cumulative Layout Shift, how to find the moving element and how to…
2026/08/04 · 8分で読めますDMARC Explained: Policies, Alignment and a Safe Rollout
DMARC tells receivers what to do with mail that fails authentication for your domain. Learn the record tags, alignment rules and a safe path…
2026/08/04 · 8分で読めますHow to Redirect HTTP to HTTPS the Right Way (Without Loops)
A step-by-step guide to redirecting HTTP to HTTPS on Apache, Nginx, WordPress and CDNs: one permanent hop, no loops, no lost pages and no…
2026/08/03 · 8分で読めますHeading Tags for SEO: How to Use H1, H2 and H3 Properly
How to structure H1, H2 and H3 headings so visitors can scan a page and search engines understand it, with examples and the most…
2026/08/03 · 8分で読めますHow to Improve Largest Contentful Paint (LCP) on Any Website
LCP measures when your main content appears. Learn how to find the LCP element, split the delay into four parts and fix the part…
2026/08/03 · 8分で読めますWhat Is DKIM and How to Set It Up for Your Domain
DKIM signs every message so receivers can trust it came from your domain. Learn how it works, how to set it up for each…