Alert
Primary
This is a primary alert. You should probably pay attention to it.
Secondary
This is a secondary alert. It's not too important, you may ignore it.
Success
This is a success alert. Something good must have happened!
Info
This is an info alert. For your information only.
Warning
This is a warning alert. Be warned, you should pay attention!
Danger
This is a danger alert. Something has gone wrong, please investigate!