CSS (Cascading Style Sheets)

CSS or Cascading Style Sheets is a set of formatting instructions that controls the appearance of a webpage. In other words, it is a style language that defines layout of HTML documents. For instance, CSS covers background images, margins, lines, width, height, colors, fonts, advanced positions and many other things of a webpage. HTML can be used to add layout to websites, however, CSS offers additional options and is more precise and sophisticated.