How to Find and Fix Common Technical SEO Issues on Your Website (2026 Guide)

So you've built a website. You've invested in design, secured a domain, and launched. But a website isn't just what visitors see on screen—much happens behind the scenes. To succeed, you need to understand how the internet works and how Search Engine Optimization (SEO) works.

Speed is a critical factor. A slow site can suffer from weak SEO because most people won't wait long for a page to load—especially in 2026, when user expectations for instant performance are higher than ever.

Site speed is a well-known topic with its own set of challenges, such as Largest Contentful Paint (LCP), Cumulative Layout Shift (CLS), and server response times—all central to Google's Core Web Vitals. I'll cover those in a separate article.

This guide focuses on the problems that prevent search engines from reaching and reading your pages.

In my opinion, technical SEO is much harder to implement than regular SEO, which centers on content and keywords. The technical side typically requires developer knowledge and may demand changes that feel uncomfortable if you lack a technical background.

A technical problem can go unnoticed for months because you usually can't see it. It's not a design issue. You only discover it by running specific checks—for example, with Google PageSpeed Insights or modern crawl and indexation tools.

In this tutorial, you'll find and fix the most common technical SEO issues on a small practice site. Rather than using a real website and embarrassing its owners, I built a practice site with the problems already baked in.

Table of Contents

• Prerequisites
• What Is Technical SEO?
• How Common Are These Problems on Real Websites?
• How to Set Up the Practice Site
• How to Check a Page's HTTP Status Code

via FreeCodeCamp