SMS Term
Double Opt-In
A two-step subscription confirmation where customers first sign up, then confirm via a reply text (e.g., 'Reply YES to confirm'). Provides stronger consent documentation and higher-quality lists.
Related Terms
Trigger Message
An automated SMS sent when a customer takes a specific action. Examples: abandoned cart reminder, appointment confirmation, or birthday offer. Triggers send the right message at the right moment.
Carrier
A mobile network provider like Verizon, AT&T, or T-Mobile that delivers SMS messages to customers. Each carrier has its own filtering rules and compliance requirements for business texting.
Carrier Filter
Automated filters used by mobile carriers to block or throttle messages that might be spam or violate carrier guidelines, protecting customers from unwanted texts.