what is padding in development? code example

Example 1: padding

/* Individual Padding */
padding-top: 1px; // just top padding
padding-right: 2px; // just right padding
padding-bottom: 3px; // just bottom padding
padding-left: 4px; // just left padding

/* Shorthand padding */
padding: 25px 50px 75px 100px;
  /*top padding is 25px
  right padding is 50px
  bottom padding is 75px
  left padding is 100px*/
padding: 25px 50px 75px;
  /*top padding is 25px
  right and left paddings are 50px
  bottom padding is 75px*/
padding: 25px 50px;
  /*top and bottom paddings are 25px
  right and left paddings are 50px*/
padding: 25px;
	/*all four paddings are 25px*/

Example 2: padding

Padding is how much an element is away from itself — 
how much distance an element wants to keep with the elements inside it.