ROI
ROI relates the net profit of an investment to its cost, usually expressed as a percentage
What it means, how it is used and where it comes up, with its related concepts.
What it is and how it works
Calculating it requires defining which benefits, costs and period are included. In marketing it can be difficult to isolate the effect of one action from other influences. It is important to distinguish attributed results from truly incremental benefits and to explain the assumptions used.
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