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. 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.
Understanding the Context
Learn how next to emails that gmail thinks is important, you'll see a yellow importance marker. If an email hasn't been marked as important, the marker will be empty. To see all your emails.
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