A welcome series is an automated sequence of emails triggered when someone subscribes to your email list for the first time - before they have made a purchase. It is the most engaged flow in email marketing - welcome emails typically outperform ordinary campaigns on clicks and revenue per recipient - and the first real opportunity a brand has to convert a new subscriber into a paying customer. How you use that window defines what percentage of your list ever buys.
The welcome series has a dual mandate: build enough brand affinity to justify a first purchase, and create enough urgency to make that purchase happen now rather than never. Most subscribers who do not purchase within the first 30 days of joining a list never will - their intent was high at the point of sign-up and decays rapidly. A well-structured welcome series front-loads value and moves subscribers toward conversion before that window closes.
A typical high-performing welcome series for a Shopify brand runs 3-5 emails over 5-7 days. The first email (immediate) delivers whatever was promised at signup - the discount code, the lead magnet, the free guide - and introduces the brand's story and point of difference in a way that justifies why this brand, not a competitor. The second email (day 2-3) builds credibility: bestsellers, social proof, customer reviews, press mentions. The third email (day 4-5) addresses common objections and answers the questions that typically prevent a first purchase. The fourth email (day 6-7) creates urgency: the welcome discount is expiring, moving undecided subscribers off the fence.
For Shopify brands using Klaviyo, the welcome series is triggered by the Subscribed to List event and should be suppressed for anyone who purchases during the sequence - sending a discount offer to someone who already bought at full price is both wasteful and brand-damaging. Segmenting the series by signup source (popup, quiz, checkout opt-in) and tailoring the first email accordingly consistently improves conversion rates, since a subscriber who completed a skincare quiz has signaled different intent than one who signed up for a generic 10% off offer. The welcome series feeds directly into the broader email retention infrastructure: subscribers who convert within the welcome series then enter the post-purchase flow, while those who do not become candidates for the abandoned cart and browse abandonment flows once they start engaging with products.
The welcome series is usually the first fully-designed email sequence a new subscriber sees, which makes template consistency across all four or five emails matter almost as much as the copy sequencing — a series that looks visually disjointed from one email to the next undercuts the credibility-building the second email is supposed to do. That's why Klaviyo template design and the flow logic behind Klaviyo email and SMS marketing are usually planned together rather than handed off separately.
Building the sequence in Klaviyo — the trigger, the suppression logic, the timing between emails — is a separate exercise from planning the content, and a guide to building a Klaviyo welcome series flow covers the setup decisions that determine whether the automation fires the way it’s supposed to.
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