CSS Maybe One or Two Fair Uses of !important

One way to use !important is if you have to override a style that cannot be overridden in any other way. This could be if you are working on a Content Management System (CMS) and cannot edit the CSS code. Then you can set some custom styles to override some of the CMS styles.
Another way to use !important is: Assume you want a special look for all buttons on a page. Here, buttons are styled with a gray background color, white text, and some padding and border:
The look of a button can sometimes change if we put it inside another element with higher specificity, and the properties get in conflict. Here is an example of this:
To "force" all buttons to have the same look, no matter what, we can add the !important rule to the properties of the button, like this: