ROI, return on investment

ROI, or return on investment, is a calculation used to determine the relative efficacy of an ad campaign in financial terms, in particular whether or not an ad campaign has generated more or less new revenue than it cost. Due to the direct response nature of many internet ad campaigns, it may be possible to determine ROI with much greater precision than, for example, a television commercial. The response to broader, branding-style campaigns may be more imprecise.

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