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What Are HTML and CSS?

The web has come a long way since it launched, in 1991. We’ve seen some big evolutions: from plain, static pages to slightly nicer-looking websites, to fully interactive web-based applications that we can access from anywhere in the world—including the device in our pocket.

And while the web has evolved considerably over that time, at its very core are still two important technologies: HTML and CSS. But what are they, and why should you know them?

What Is HTML?

HTML stands for HyperText Markup Language and it does two important things: it describes how webpages should look, and it defines the semantics of those pages.

But what ...

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