title: How to avoid invalid traffic, AdMob Ads
body: <p>I've created an admob account latel,y I did my best to avoid ad serving limits because I was told that it is improtant to be careful about it from a friend. so I did all my best to avoid any violation.</p>
  <p>So I used gabbing (cab limit) to limit how many times my unit will be shown to same user. I chose to show the ad 3 times for every 30 minutes to the same user, it worked, but then I've noticed that impressions is little compared to requests, so I've decided to raise the amount of impressions so I make it 4 times for 30 minutes.</p>
  <p>After doing that I've got a message from AdMob saying &quot;the ad serving is limited for your app&quot;</p>
  <p>Note: I suspect that a group of shady users wants to do harm to my app, by reporting it to AdMob or by intentionally clicking on my ads to generate invalid clicks.</p>
  <p>What should I do?</p>