Tooltips are a great way to provide additional information to your users. This pure CSS technique that we are about to learn employs both pseudo-elements and custom data- attributes.
David Conner is a designer and front-end developer. He blogs about Sass on sassbreak.com and makes stuff on [Codepen](http://codepen.io/davidicus/).
Follow him at [@Dave_Conner](https://twitter.com/Dave_Conner).
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