Work out revenue per thousand views, and per thousand visits.
Optional. Adding it gives you session RPM, which is the figure to use when buying traffic.
$4.50 page RPM
Page RPM and session RPM answer different questions and get mixed up constantly. Page RPM tells you what a page view is worth, which is the number to use when deciding whether more content is worth producing. Session RPM tells you what a visitor is worth, which is the number that belongs in any conversation about buying traffic, since you pay per visitor and not per page. A site with several pages per session can have a modest page RPM and a healthy session RPM at the same time.
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