Tooltip

<button icon icon="add" data-tooltip="Add users to your feed">
<button icon icon="add" data-tooltip="Add users to your feed" data-inverted="true">

<button data-tooltip="Add users to your feed" data-position="top left">Top left</button>
<button data-tooltip="Add users to your feed" data-position="top center">Top center</button>
<button data-tooltip="Add users to your feed" data-position="top right">Top right</button>

<button data-tooltip="Add users to your feed" data-position="right center">Right center</button>
<button data-tooltip="Add users to your feed" data-position="left center">Left center</button>

<button data-tooltip="Add users to your feed" data-position="bottom left">Bottom left</button>
<button data-tooltip="Add users to your feed" data-position="bottom center">Bottom center</button>
<button data-tooltip="Add users to your feed" data-position="bottom right">Bottom right</button>