For instance, if a class defines a width of 100 pixels, all DIVS referencing that class will be 100 pixels wide. You can override a DIV's CSS class definition by updating the DIV's HTML code.

How to Make a Block of HTML Text Appear in Front of Another. HTML div containers make it possible for you to add interesting special effects to Web pages on your business website. Divs, which act ...

Google’s Search Relations team explains how CSS affects SEO, addressing myths about class names, pseudo elements, and page performance.