HTML5 Semantic & Meta Tag Reference | Modern Structure Grids

W3C Structure Standard

HTML5 Semantic & Meta Tag Reference

Verified structural grids for SEO-friendly code and modern document architecture.

Semantic Layout Tags

Tag	Role / Purpose	SEO Impact
<main>	Specifies the unique, primary content of the document.	Critical
<article>	Self-contained content (blog posts, news items).	High
<aside>	Secondary content (sidebars, pull quotes).	Medium
<nav>	Major navigation links for the site or page.	High

Essential Meta Snippets

Type	Code Snippet	Platform
Viewport	<meta name="viewport" content="width=device-width, initial-scale=1">	Mobile / UX
Charset	<meta charset="UTF-8">	Global Browsers
Social (OG)	<meta property="og:title" content="...">	FB / LinkedIn
Twitter	<meta name="twitter:card" content="summary">	Twitter (X)

Accessibility Tip: Never use a <div> when a semantic tag like <section> or <nav> is appropriate. Semantic tags provide meaning to Screen Readers and improve your ranking on search engines.

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