Media object
Abstract object styles for building various types of components (like blog comments, Tweets, etc) that feature a left- or right-aligned image alongside textual content.
The default media allow to float a media object (images, video, audio) to the left or right of a content block.
<div class="media">
  <a class="pull-left" href="#">
    <img class="media-object" src="/portals/25/..." alt="...">
  </a>
  <div class="media-body">
    <h4 class="media-heading">Media heading</h4>
    ...
  </div>
</div>
 
Media list
With a bit of extra markup, you can use media inside list (useful for comment threads or articles lists).
<ul class="media-list">
  <li class="media">
    <a class="pull-left" href="#">
      <img class="media-object" src="/portals/25/..." alt="...">
    </a>
    <div class="media-body">
      <h4 class="media-heading">Media heading</h4>
      ...
    </div>
  </li>
</ul>