Some of the most important CSS concepts to grasp are floating, positioning, and the box model. These concepts control the way elements are arranged and displayed on a page and form the basis of many layout techniques. More recently, new standards specifically designed to control layout have been introduced, and we will look at these individually in forthcoming chapters. However, the concepts that you learn in this chapter will help you fully grasp the intricacies of the box model, the difference between absolute and relative positioning, and how floating and clearing actually work. Once you have a firm grasp of these fundamentals, developing sites using CSS becomes that much easier.