Glossary

Common technical terms in email

Stay current and expand your email knowledge with our list of common technical terms.

Send Time Optimization

Send Time Optimization (STO) is a feature that allows brands to send emails at the optimal time to reach every recipient. This boosts engagement rates as email messages are sent to recipients at times they’re most likely to interact with the email.

STO uses machine learning to analyze metrics like open rates to project email-sending practices and patterns. This allows senders to optimize and schedule email delivery to score more email opens and conversions.

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Sender ID