SMS Term
Unsubscribe Rate
The percentage of recipients who opt out after receiving a message. Calculated as (opt-outs ÷ delivered messages) × 100. A rate that climbs suggests messaging too often or sending irrelevant content.
Related Terms
Click-Through Rate (CTR)
The percentage of SMS recipients who click a link in your message. Calculated as (clicks ÷ delivered messages) × 100.
Delivery Rate
The percentage of sent messages that successfully reach recipients. Calculated as (delivered messages ÷ sent messages) × 100.
A2P (Application-to-Person)
Automated text messages sent from a software application to a customer's phone. This includes marketing campaigns, appointment reminders, and transactional alerts. A2P messaging requires carrier registration for compliance.