Introduction to HTML and CSS

Whether you want to build a web page to advertise your business, blog about a hobby, or maintain an online community, HyperText Markup Language (HTML) and Cascading Style Sheets (CSS) are the foundations upon which you will build.

HTML and CSS work together but each has a different role in making a web page. A web page is made up of lots of different types of content (text, images, links, video, and audio). HTML structures that content and CSS styles it. Together, they tell the browser how and what to render.

These two technologies are simple to get started with and provide enough power and expressivity that they let you get your ideas out there to the vast audience on the web.

Navigate to a website and what you see is the rendered output of content marked up with HTML and styled with CSS. As a browser user, you have access to the source code of a web page. In Chrome, for example, you can view a page’s source code by pressing the keys Ctrl...