Email Retargeting

Email retargeting is behavior-triggered email to people you can identify and lawfully mail: the browse-abandonment note that remembers the sofa, the cart flow the CHECKOUT-ABANDONMENT entry covers, the price-drop and back-in-stock alerts, the lapse-triggered win-back. Its sibling CRM-RETARGETING aims ads by relationship data; email retargeting answers behavior in the inbox — cheaper per touch, consent-bound, and limited to the identified slice of traffic.

The mechanism joins two systems this glossary documents: identity (the visitor must resolve to a mailable contact — logged-in users, clicked-through subscribers whose session carries the email association, the FIRST-PARTY-COOKIE doing the remembering) and eventing (the CUSTOM-EVENT stream that says 'viewed product, left'). The consent line is structural, not stylistic: mailability comes from the opt-in's scope (the CASL/CAN-SPAM/GDPR family), and the third-party 'we identify your anonymous visitors and email them' services sell exactly the violation the laws name — identification is not permission. The craft within the line: timing windows tuned per trigger (browse flows land within hours while the intent is warm; the CONVERSION-LAG logic of considered purchases stretches them), helpfulness as the register (the email that answers — sizes, reviews, the question that stalled them — outperforms the email that nags), frequency caps and suppression so one browsing session doesn't spawn a week of pursuit (the CRM entry's suppression discipline in miniature), and incrementality honesty — cart flows especially claim conversions that were returning anyway, so the holdout test prices the program (the standing lesson of every retargeting entry). Measurement mirrors lifecycle email: per-flow revenue against holdout, not last-touch self-congratulation.

Email retargeting matters wherever identified traffic browses without buying — e-commerce natively, B2B's pricing-page visits and doc views just as well. It matters most as the high-intent half of lifecycle email: triggered flows reliably out-earn calendar campaigns per send. The discipline is the consent line respected absolutely, helpful registers over pursuit, suppression and caps wired, and holdouts pricing what the triggers truly add.

Email retargeting grew from e-commerce's cart-recovery flows in the 2000s into the full behavior-triggered family as ESPs gained event streams; the consent boundary hardened alongside — the anonymous-visitor-identification industry repeatedly testing, and losing, the line the spam laws drew.

Etymology: source.

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Areas of marketing where email retargeting is a core concern: