In this episode, Naomi talks about all things CPM. CPM is an acronym for cost per mille, meaning the cost per thousand impressions. It refers to how much is earned when an ad published is seen a thousand times on a website, and is used to monitor ad performance.CPM is an important metric for publishers in helping them understand how much ad revenue is being earned from their website. Identifying a high CPM revenue network will greatly help publishers in earning higher revenue for the same amount of ad impressions a website is receiving.