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What HTML Actually Is · Lesson 1 of 18

What Is HTML?

A free lesson from Swipe Coding · HTML, level 1 · updated October 2026

By the Swipe team, founded by Colin · how we make lessons

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Every website you've ever visited is built on this one idea. 🌐

HTML stands for HyperText Markup Language. It is not a programming language in the traditional sense — it does not calculate, loop, or make decisions. Instead, it describes the structure and content of a web page: which piece of text is a heading, which is a paragraph, which is a link.

<h1>Welcome</h1>
<p>This is a paragraph of text.</p>
HTML labels content with tags — here, a big heading and a paragraph.

"Markup" means exactly that: you take plain text and mark it up with tags that say what each piece is. A browser reads those tags and displays the content accordingly — a heading looks big and bold, a paragraph wraps normally, a link is clickable.

Every website you've ever visited — no matter what it's built with underneath — sends HTML to your browser in the end. Frameworks and backend languages generate it, content management systems assemble it, but HTML is always the actual thing the browser receives and renders.

Quick check

What does HTML actually do?

Fill in the blank

HTML stands for HyperText ____ Language.

True or false

HTML is a programming language that can perform calculations and loops.

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