Pageviews: Pageviews are generated when users view a web page on a website, and each additional page view is counted when a user visits more than one page.
eCPM: Also known as effective cost per mille, eCPM measures ad monetization performance based on revenue earned per 1000 impressions.
“eCPM = Total Ad Earnings / Impressions x 1000”
CPM: A cost per 1,000 impressions or cost per mille, refers to how much it costs to have an ad show up a thousand times on a website. The CPM metric analyzes ad performance.
Ad Units: An ad unit is a portion of a web page or app where an advertisement is served. They are displayed in many sizes, formats, and layouts via sticky ads, interstitial ads, banner ads, etc.