CPM or Cost-Per-Mille is an online advertising payment model which charges the advertiser for every 1,000 impressions of his ad inside a publisher inventory. It is the most popular payment method among digital publishers for mobile ads. This is because CPM ads focus on impressions which benefit publishers the most. CPM model is known for delivering 1000 ad impressions on any website or blog. If a website caters to numerous visitors every day, then that is the best platform to earn more ad revenue from CPM Ads. CPM Ad networks are the perfect choice for newbies to make money through impressions of the audience on their ad. CPM ad networks help to obtain better CPM for the same impression and traffic. CPM ad networks are the most beneficial for publishers and bloggers who aim to get a high volume of traffic. CPM is a crucial metric for predicting the amount of revenue publishers can earn by displaying ads in their media space. An estimated eCPM of any popular ad network can be combined with other data like an app’s daily-active-user count or the average number of ad impressions served to gauge the amount of net ad revenue they can require to generate.