<ul class="activity-list">
  <li class="ad-container">
    <div class="ad leaderboard" style="width: 300px; height: 50px;">
      …
    </div>
  </li>
</ul>
  
      <ul class="activity-list">
  <li class="ad-container">
    <div class="ad leaderboard" style="width: 468px; height: 60px;">
      …
    </div>
  </li>
</ul>
  
      <ul class="activity-list">
  <li class="ad-container">
    <div class="ad leaderboard" style="width: 728px; height: 90px;">
      …
    </div>
  </li>
</ul>
  If more than one advertisement appears in a list, each unit gets a unique name (for tracking)
      
      
      <ul class="activity-list">
  <li class="ad-container">
    <div class="ad leaderboard" style="width: 728px; height: 90px;">
      …
    </div>
  </li>
  …
  <li class="ad-container">
    <div class="ad middleboard1" style="width: 728px; height: 90px;">
      …
    </div>
  </li>
  …
  <li class="ad-container">
    <div class="ad middleboard2" style="width: 728px; height: 90px;">
      …
    </div>
  </li>
</ul>
  
    <div class="ad-container">
  <div class="ad baseboard" style="width: 300px; height: 50px;">
    …
  </div>
</div>
  
    <div class="ad-container">
  <div class="ad baseboard" style="width: 468px; height: 60px;">
    …
  </div>
</div>
  
    <div class="ad-container">
  <div class="ad baseboard" style="width: 728px; height: 90px;">
    …
  </div>
</div>
  <aside>
  <div class="ad" style="width: 300px; height: 125px;">
    …
  </div>
</aside>