SEO basics

Summary

The on-page fundamentals — semantic structure, heading hierarchy, descriptive links, fast load times — that help search engines understand and rank your pages. SEO also depends on crawlability, indexability, useful content, internal linking, page experience, and technically sound rendering—not just adding keywords or headings.

• 1Audit a page you've built with Google's Lighthouse SEO check. Validate your understanding by applying it in a small practical example.
• 2Learn proper heading hierarchy (one `<h1>`, logical `<h2>`/`<h3>` nesting). Focus on understanding the underlying reason it works, not only memorizing the definition.
• 3Understand how descriptive alt text and link text help both SEO and accessibility.