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Retention Rate

A metric that measures the percentage of customers or users who continue to engage with or remain with a company over a specified period. It is calculated by dividing the number of customers who remain at the end of a period by the number of customers at the beginning of the period, then multiplying by 100.

Related Terms

Click-Through Rate (CTR)

Click-Through Rate (CTR) measures the percentage of email recipients who click links. It indicates engagement and campaign effectiveness, helping optimize content, design, and CTAs for better performance.

Interest Rate

The percentage of recipients who show engagement or interaction with an email campaign relative to the total number of emails delivered.

Open Rate

Open rate measures the percentage of recipients who open an email, indicating engagement. It's calculated as opened emails divided by delivered emails (excluding bounces), then multiplied by 100.

Reply Rate

Reply rate measures the percentage of recipients who respond to an email. It's calculated as replies divided by delivered emails, then multiplied by 100 to express it as a percentage.

Customer Retention

Customer retention is a business’s ability to keep customers long-term, reducing churn and maximizing value. It involves loyalty strategies and key metrics like retention rate, CLV, churn rate, and NPS.
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