What high-converting automation will send to customers after they sign up for marketing, introducing them to your brand and encouraging their first purchase?

The Welcome series flow is the correct answer because its primary purpose is to introduce new subscribers to your brand, share your value proposition, and encourage their initial purchase. This automation is triggered immediately after someone signs up for marketing communications, making it ideal for nurturing new leads into first-time customers. An Abandoned cart flow targets users who added items to their cart but didn't complete the purchase, while a Browse abandonment flow targets users who viewed products but didn't add them to a cart. Neither of these is designed for initial brand introduction after a marketing sign-up.