CPA statistics are closely related to CVR and CPC.
CPC/CVR = CPA.
Conversion rate (conversions/clicks)
World's No. 1 ad network Google Ad network with reach of more than 80% global internet users and 6 billion ad impression/day. So it provides an important customer base to run your Ad. Before going to reach you have to know about the performance of this channel and How we can increase the performance of Google content network.
Use Conversion Optimizer and Site and Category Exclusion tool to maximize ROI. It has been seen that Lower-spending accounts tended to perform better than higher-spending accounts on the Content Network relative to search. Content Network clicks are on average over 28% cheaper than Search Network clicks. After Analyzing 25000 Adwords account a whitepaper from Google released CPA Performance Trends on the Google Content Network