This will set the bottom padding of the object.
It takes the following values.
a) pt : You can set values in points. (e.g: 10pt or 100pt).
b) px : You can set values in pixels. (e.g: 10px or 100px).
c) % : You can set values in percentage. (e.g: 10% or 100%).
d) auto : This will set a automatic margin.
Note: The difference between padding and margin is that padding set values inside the objects scope,
while margin moves the whole object away from the nearby object.
CSS - Cascading Style Sheets can be used along with html tags as explained in this site.
This simple CSS will help you to create much elegant and neat html web pages.
This does not need any additional softwares or codings.
All web browser are capable of handing CSS codes.
Note 2: If required you can using <span> instead of <div> tags.
div tag will start and end on new lines. span will not exceed the tag area.