CSS3 makes the web page and its content load faster and accurate. Because CSS loads simultaneously with page loading as it is embedded in the web page, there wont be any additional time consumption. But with CSS3, just 1 line of CSS3 code is enough to extend this behavior to support other browsers couple of additional lines will be needed. So all in all, CSS3 is a huge time saver and helps load web page faster There are many way CSS3 is important aspect of web designing. you can do many things such as make an 3D objects, rotate object, maximize minimize with the help of hover, active links, and much more. CSS is used to control the style and layout of Web pages. CSS3 is the latest standard for CSS.