Why manually optimize when you can automate??? 
CPA Target Bidding. How does it work and why do you need it to convert traffic? Here's a quick case study for Nord VPN (Desktop/mobile) across Pop-Under, Interstitial and In-Page Push. Find out why adoption continues to climb and campaign bids keep coming out below target.
Check out the full article.
@Adcash When I run CPA target campaigns on In-Page Push or Interstitials do I they run then on CPM or CPC?