CSS, or Cascading Style Sheets, defines the look and formatting of that HTML. Both are essential to coding your own website, and here's how to get acquainted with them.

For example, if you want the page "index.html" to use the CSS template "template.css," then save template.css in the same folder in which you store "index.html." Open the HTML file in a text editor.

There are a wide number of services that make it easy to create something quickly, even if you don’t have a deep knowledge of CSS, HTML, and JavaScript (JS)—the building blocks of the web.