why we use padding in css code example

Example 1: css padding

padding: 5px 10px 15px 20px; //top right bottom left

padding: 10px 20px;//top & bottom then left & right

padding-top: 5px; //just top padding
padding-right: 10px; //just right padding
padding-bottom: 15px; //just bottom padding
padding-left: 20px; //just left padding

Example 2: padding css

padding:10px 5px 15px 20px;
means
top padding is 10px
right padding is 5px
bottom padding is 15px
left padding is 20px

Example 3: css padding

padding: 1%;  // scales proportionally - on ALL sides

Example 4: padding css

padding is clockwise