Let's be clear: observations do not mean whether or not an ad was clicked on. The CTR, or Click Through Rate, is a metric that indicates whether or not an ad was clicked on, and it represents the percentage of users who see the ad and then click on it. CTR, on the other hand, is often used in conjunction with CPM to determine the effectiveness of an ad campaign.
There are a few key pieces of information you'll need to gather in order to measure CPM.
To begin, figure out how much your campaign will cost in total. After that, you must calculate the total number of impressions or views that your ad has got. Multiply this by 1000. For example, if your advertisement was viewed 20,000 times and you divide it by 1000, the result is 20.
Simply divide the total cost of the campaign (determined in the first step) by the result obtained by dividing the total Ad views by 1000 to get your CPM value.
The formula for calculating CPM is as follows:
CPM = Total campaign expense (total number of impressions x 1000)