You can see stats for the effectiveness of every campaign, set or individual ad.
What are these stats?
The number of views of your advert by users. The ad must be viewed to the end to count and one person can watch the same ad many times.
The total sum of nims spent on showing this ad.
Price per view
The sum you pay a user for watching the ad 1 time. You pay nothing if they watch less than 5 seconds.
How many users clicked on the button on your advert
The relationship between the number of users who saw the advert and those who then progressed to the desired material.
The number of people who opened the initial announcement of the advert.