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Marketing KPI for Paid Email: ROAS and Lift Metrics
Paid email is one of those channels that looks simple on the surface and turns intricate as soon as you try to prove it works. The basic promise is familiar: send relevant messages, drive measurable actions, and make the math work. The reality is messier. Your recipients overlap with other channels, your site has attribution quirks, and “open” metrics rarely tell the whole story. When you are trying to set a marketing key performance indicator that actually guides decisions