A retail company launches a new mobile app and wants to quickly increase its user base. They decide to run a campaign that specifically tracks and pays for each time a user downloads and installs the app from an advertisement. Which mobile marketing metric is the primary focus of this campaign?
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A
Click-Through Rate (CTR)
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B
Cost Per Install (CPI)
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C
Return on Investment (ROI)
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D
Customer Lifetime Value (CLV)