What are CSS style sheets?
Cascading Style Sheets are instructions that tell Internet browsers how to present the content of your website to your web visitors. Style sheets can include typographical information on how the page should appear (such as fonts, font size, colours, and spacing). This ensure that all your pages are consistent in style and makes style changes much easier – if you change your mind about a font type or colour, we only need to change the CCS page instead of every single page. You can also lay out the design of your page using CCS. This is becoming more and more popular.