Why should I use a container div in HTML?

Question

I have noticed a common technique is to place a generic container div in the root of the body tag:

  
    ...
  
  <         


        

Answer 1

Most of the browser are taking web page size by default. So, sometime page will not display same in different browser. So, by using user can change for specific HTML element. For example, user can add margin, size, width, height etc of specific HTML tag.