How to Find and Fix the 7 Most Common SEO Mistakes in Your HTML

Every developer writes HTML, but most overlook critical SEO details that silently hurt search rankings. Here's a practical checklist of the 7 most common SEO mistakes found in production codebases — and exactly how to fix each one.

1. Missing or Empty Title Tags (affects 23% of pages)

Search engines use the <title> tag as the primary signal for what a page is about. An empty title is worse than a bad one.

Fix:

<!-- Bad -->