If you know anything about web development, then you need to be aware of what a style sheet is. Also known as CSS, it is a styling guide for HTML elements that describes how they are displayed on screen, paper, or in other media.
A style sheet is an external CSS file that contains the CSS rules to design the layout of a website. These rules apply css properties on HTML elements. It makes a website more attractive. It is embedded in an HTML by <link> tag. For example, we have an HTML file (text.html) that uses a style sheet named designsheet.css. Both files are in the same folder. Now see the HTML.