HOW TO OPTIMIZE
a) The most important thing is to ensure that traffic you are buying is not junk traffic
b) Then we have to look at the different components of the campaign and begin to drop all the dead weight (Unnecessary and unprofitable components)
c) Look at the landers, and drop the lander that have the lowest conversion, It might be as a result of lack of interest in the angle of the banner (you can do this by split testing)
Now that most of the dead weight has been dropped, it is time to
d) Optimize everything (still look out for the worst and cut it out)
P.S This is a continuous process as you have to always go back and look at the data.
thanks for useful information!)