Email copy testing
You only have one chance to send that marketing promo to your email list. One chance to send that cold email to a prospect.
Hoping and praying is a lousy tactic. Copy test your email before you send it, so you'll know what in your email copy works, what's a meh, and what even turns them off.
Instead of having your SDRs take weeks to test cold email templates (and burn chances for opportunities), you could get data on what works or doesn't now.