title: Changing existing ads to house ads admob
body: <p>I already have admob ads active on my android app. These were not house ads.
  But now, I want to display 'House ads'.</p>
  
  <p>For this I added 'New house ad campaign' for my existing ad unit, following instructions from this link:</p>
  
  <p><a href="https://support.google.com/admob/answer/3210442?hl=en" rel="nofollow">Creating House Ads</a></p>
  
  <p>Added image and associated redirect link.</p>
  
  <p>Enabled it.
  For testing purpose I added 1000 impressions for 1 day.
  But they aren't displaying. No change to previous ads. I also pause previous ad sources and enabled house ad only, still no change.</p>
  
  <p>I've following questions:</p>
  
  <ol>
  <li>Do 'House ads' take time to activate? If yes, how much?</li>
  <li>When using house ad campaign with 'Impression goal' set, other ads will also display? Like third party ads?</li>
  </ol>
  
  <p>I want these ads to be displayed in Android app.</p>
  
  <p>Looking forward to help. Thanks in advance.</p>