Alerts are some elements that you can drop into a form or inline on a page to show information,success, warnings or error. The alert displays an alert box with a specified message and the alert box is often used if you want to make sure information comes through to the user.
The shortcodes for Alert are available by HooThemes. You can use them easily.
1) First, in the wordpress admin, go to the Editor of Pages or Posts, click the Shortcodes button on the top of the Editor box.
2) In the lightbox, select Alert. Then choose the Alert Box Type, you can choose info, success warning and error to show in your site.
3) Click the Insert Shortcode button, the codes will be inserted to the Editor box. Then click Preview, it will show like below.
(Note: The Alert prevents the user from accessing other parts of the page until the box is closed, make sure not to overuse it.)