The Tooltip plugin is small pop-up box that appears when the user moves the mouse pointer over an element
To create a tooltip, add the data-toggle="tooltip" attribute to an element. Use the title attribute to specify the text that should be displayed inside the tooltip
Note: Tooltips must be initialized with jQuery: select the specified element and call the tooltip() method.
By default, the tooltip will appear on top of the element. Use the data-placement attribute to set the position of the tooltip on top, bottom, left or the right side of the element: