SEMURAI Academy
Technical SEO
The technical side of SEO: server response codes, redirects, 404 and 5xx errors, crawl budget, Core Web Vitals and choosing a server. Guides with ready-to-use examples.
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Headless CMS – What It Is, How It Works and How It Affects SEO
A headless CMS stores content and serves it through an API, while a separate front end builds the site. Here’s how it…
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Core Web Vitals: What They Are and How to Improve LCP, INP, CLS
Core Web Vitals are LCP, INP and CLS. I explain the thresholds, how they affect Google rankings, how to measure them and…
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5XX Server Errors: What 500, 502 and 503 Mean and How to Fix Them
What 5XX server errors mean, how Google treats them, how to use a 503 safely during maintenance and how to track down…
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HTTP 3xx Status Codes (300–308): How 301, 302, 303, 307 and 308 Differ
301, 302, 307 or 308? The differences between 3xx redirect codes in one table, their impact on SEO, plus 303, 304 and…
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How to Set Up a 301 Redirect (.htaccess, Nginx, PHP, WordPress)
Ready-to-copy 301 redirect examples for .htaccess, Nginx, PHP, WordPress and Cloudflare, plus the most common mistakes and how to check that a…
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404 vs 410 Errors – What They Mean and How to Fix Them (4XX)
What 404 and 410 errors mean, how they differ and how Google treats them. When to use a 301, when a 410,…
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Crawl Budget: What It Is and When to Optimise It
Crawl budget is the set of URLs Googlebot can and wants to crawl. Who it really affects, what wastes it, how to…
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Apache vs Nginx vs LiteSpeed – Best WordPress Server in 2026?
Apache, Nginx or LiteSpeed for WordPress? Licences, HTTP/3, page caching and the effect on TTFB – plus my own example of cutting…