This heading has the normal margin

These two paragraphs have the normal space in between them.

These two paragraphs have the normal space in between them.

This heading has no bottom margin

These two paragraphs have no top margins and a small 2 pixel bottom margin.

These two paragraphs have no top margins and a small 2 pixel bottom margin.

This paragraph has a 10% left margin. That means the margin grows as the page grows wider.

This paragraph has a 100px right margin. That means the margin is fixed in size, no matter how wide the page is.