What Is Semantic HTML?
Semantic HTML is the practice of using HTML elements that convey meaning about the content they contain — not just visual presentation. Instead of using `<div>` for everything, semantic HTML uses elements like `<header>`, `<nav>`, `<main>`, `<article>`, `<section>`, `<aside>`, and `<footer>` to communicate the role of each page region to browsers, search engines, and screen readers.
Semantic vs non-semantic HTML
Non-semantic: `<div class='header'>`, `<div class='nav'>`, `<div class='content'>`. Semantic: `<header>`, `<nav>`, `<main>`. The semantic versions convey meaning even without CSS class names. Both render visually identically, but semantic HTML communicates structure to machines (crawlers, screen readers, browser accessibility tools).
Semantic HTML and SEO
Search engine crawlers parse semantic structure to understand your page. Using `<article>` signals a standalone piece of content. `<h1>`–`<h6>` create a heading hierarchy that crawlers use to understand topic importance. `<nav>` identifies navigation links. Proper semantic HTML reinforces your content structure for Google — misusing heading tags (e.g. multiple `<h1>` tags) can confuse crawlers.
Key semantic HTML elements
`<header>` — introductory content (logo, navigation, hero). `<nav>` — navigation links. `<main>` — the primary content of the page (only one per page). `<article>` — self-contained content (blog post, product card). `<section>` — thematic grouping of content. `<aside>` — supplementary content (sidebar, related links). `<footer>` — closing content (copyright, links). `<figure>` + `<figcaption>` — media with a caption.
Semantic HTML & Canvas Builder
Canvas Builder generates semantic HTML with proper structural elements — `<header>`, `<main>`, `<section>`, `<footer>` — and a correct heading hierarchy, benefiting both SEO and accessibility.
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