What is ToolTip
Tooltip is a small popup box which opens when you mouse hover any element. This popup box gives some brief information about that element. Thus ToolTip improves user interface of the website.
Live Demo:
http://demo.drupar.com/paripro/tooltip
How to create Tooltip
Tooltip will show text under attribute title. Just add class tooltip to the element. See below sample code.
<a href="#" title="This will show up in the tooltip" class="tooltip">Your Text</a>