1. CPM
Cost per thousand is the price of 1000 ads impression. Web publisher like
using cpm because they get paid for displaying the ads.
To plan your media better, you need to be sure how much budget you have
and divide using the buy type you have chosen to ascertain how long
your campaign will last and what you intend to achieve from it.
This will also help you measure your results to see if you achieved what
you intended.
2. CPC
Cost per click – This is were ad advertiser pays each time a visitor clicks on
the ad.
These are important because they help to better allocate your budget
appropriately and explain to the clients how their money will be
allocated in each campaign.
3. CTR
Click through rate – this is the number of clicks your ads gets divided by
the number of times your ad is shown and its always expressed as a
percentage.
This helps to show you if your campaign is successful and or performing …
it breaks it down to show your keywords and ads performance.