Idea of High Importance Icon
It is an exclamation point inside of a circle. Outside the circle there is another slightly larger circle just around it, creating almost a embossed or a three dimensional look.
This High Importance icon has Android KitKat style
. If you use the icons for Android apps, we recommend using our latest Material Icons icon pack (please check our sidebar on the right). Otherwise, it's a solid icon pack that looks good in small resolutions, either on the web or in print. It's characterized by thick lines, smooth corners, and is optimized for 24x24 pixels.