Metrics:
CR - the ratio of visitors who completed a target action on the page to the total number of visitors. Expressed as a percentage.
EPC - a metric displaying the webmaster's average earnings per click on their ad.
CLR - the click-through rate of the transit page, the percentage of transition from the pre-landing page to the landing page.
% of lead approval, excluding trash - the percentage of approved target actions (leads) for which a monetary payout is credited.