Use it by inlining the SVG directly into your HTML

<svg class="h-6 w-6 text-gray-500" fill="none" viewBox="0 0 24 24" stroke="currentColor">
  <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M12 8v4l3 3m6-3a9 9 0 11-18 0 9 9 0 0118 0z"/>
</svg>

Comes in 24x24 outline and 20x20 solid styles.