You can add tooltips to the content of any post or page using the following shortcode:

[tooltip url="#" message="Your Message Goes Here"]Link Text[/tooltip]
Link TextYour Message Goes Here

The tooltip shortcode takes 2 parameters: url and message. For the url parameter, you must enter a valid URL or use the pound-sign (#) before an anchor name to link to an anchor within the same page. For example, #myanchor. For the message parameter, enter the text that will appear after you hover over the tooltip’s link.