It is to control the spaces around the content.

there is two way by which we can declare this property:

1st method

p {
    padding-top: 80px;
    padding-right: 60px;
    padding-bottom: 40px;  
    padding-left: 10px;
    }
  

2nd method

p {
padding: 50px 20px 80px 60px;
}

In the above example, if there is only three value. For example 

p {
padding: 50px 20px 80px;
}

Then top value will be  50px

Left –right  value will be  20px

And button 80px

if there is only two value. for example

 p {
    padding: 50px 20px;
    }

Then top & bottom value will be 50px

And Left –right  value will be  20px

If there is only one value. for example

p {
    padding: 50px;
  }

Then top bottom Left & right all have value 50px.