!important:
!important on any declaration will override other declarations for the same element.
!important declarations override normal declarations.
A rule that has the !important property will always be applied no matter where that rule appears in the CSS document.
So if you wanted to make sure that a property always applied, you would add the !important property to the tag.
Eg: to make the paragraph text always red:
p { color: #ff0000 !important; }