Churn Rate Cost per Acquisition Cost Per Click Open Rate 
Envy
FEBRUARY 13, 2021
Customer Acquisition Cost is the total amount you spent to acquire a new customer, usually including all your marketing and sales campaigns. Churn rate. When customers cancel subscriptions or stop buying from your company, they've churned. It's an alternative metric to CPA. 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 $).
Single Grain
FEBRUARY 5, 2020
For all page views to the page, the exit rate is the percentage that were the last in the session. Cost Per Acquisition (CPA): The amount that the advertiser pays for acquiring a customer is known as the cost per acquisition. Open rate per campaign. Cost per lead.
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