Wrap any text and an optional dismiss button in .alert and one of the four contextual classes (e.g., .alert-success) for basic alert messages.
.alert
.alert-success
Build on any alert by adding an optional icon.
Build on any alert by adding an optional .alert-dismissible and close button.
.alert-dismissible
Build on any alert by adding an optional description.
Make any alert more pronounced by adding the .alert-important class to your alert
.alert-important