Churn Rate CPA CTR Open Rate 
Envy
FEBRUARY 13, 2021
Churn rate. When customers cancel subscriptions or stop buying from your company, they've churned. The Churn rate is the percentage of total customers who churn, and you'll track the churn rate to calculate overall CLTV and refine your marketing to retain these clients. Open Rate (OR).
SnapApp
APRIL 4, 2018
Email Marketing Performance – The metrics used here to measure campaign effectiveness/ROI are the standards including Delivery Rate, Bounces, Unsubscribes, Unique Open Rate, Uniq. CTR, Unique CTOR, Forwards/Shares and links clicked on. Cost-per-acquisition (CPA, ideally under target $). 2) Churn rate.
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