title: what affects Admob ad impression and click
body: <p>I have two apps, both have one bottom ad banner, on admob platform it shows the <code>impression</code> number is similiar, but the <code>click</code> number varies much. <br>
  I want to know which factor affects the number of click? Why two ads has similar impressions but varies in click number? </p>
  
  <p><a href="https://i.stack.imgur.com/VTGot.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/VTGot.jpg" alt="enter image description here"></a></p>