Bootstrap Alerts are used to provide an easy way to create predefined alert messages. Alert adds a style to your messages to make it more appealing to the users.
Alerts are created with the .alert class, followed by one of the four contextual classes i.e.
Add the alert-link class to any links inside the alert box to create "matching colored links":
To close the alert message, add a .alert-dismissable class to the alert container. Then add class="close" and data-dismiss="alert" to a link or a button element (when you click on this the alert box will disappear).
