Revenue Per Mile (RPM) is a revenue metric that can be calculated:
whereas RPMv is the RPM for impressions that are viewable.
<MATH> \text{RPM} = \frac{Revenue}{Impressions} . 1000 </MATH> where:
<MATH> \text{RPMv} = \frac{Revenue}{Viewable Impressions} . 1000 </MATH> where:
RPM can be calculated:
Impression RPM is the page revenue per thousand impressions
ie For every 1,000 ad impressions served how much revenue was made.
Session RPM is the session revenue per thousand impressions known also as EPMV
For every 1,000 ad sessions how much revenue was made.