The use of !important is very import in email creation when inline css is the correct answer. It is used in conjunction with @media to change the layout when viewing on different platforms. Use !important for development to quickly identify a problem in the cascade, but then fix the problem.

Using the !important keyword in css is a way to prevent other meddlesome programs from taking liberties to interpret your html/css in a way other than what you want. For example when someone Ò€¦ Gmail uses several signals to decide which messages to automatically mark as important, including: Whom you email, and how often you email them which emails you open which emails you reply to Ò€¦