Impression money is also known as cost per impression. This is related to websites and promotional ads. There is a cost per person in regards to web traffic.

CPM is an online advertising term that stands for "cost per mil" which is a European term adopted to mean "cost per thousand". CPMs are usually quoted as per thousand impression.

So, a $5 CPM would yield a $5 cost for an ad to be shown 1000 times.

CPM (cost per thousand impression) is contrasted with CPC (cost per click) or CPA (cost per acquisition or cost per sale) in that CPM advertising, advertisers take more risk, while CPA advertising publishers take more risk. CPC is in between the two.

CPM is cost per impression, in other words, the amount that you have to pay for each view that your ad gets.

When you show fixed cost on a per unit basis, the cost of each product will be significantly higher. This will give the false impression that the price of the product will need to be high in order to make a profit.

In online advertising, CPM stands for "Cost per Mille," or "Cost per Thousand." This metric is used to describe the cost for a thousand impressions, or views, of an ad and is used as a basis for billing if the ad campaign is impression based - rather than click-based where the advertiser pays per each click on the ad instead.