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TL;DR: A Klaviyo welcome series flow is an automated email sequence that starts when someone joins your list - usually your warmest first-purchase moment on Shopify. Trigger on the right list, send email one immediately with the promised offer, then brand story / proof / close over about a week. Exclude people who already bought so you do not keep discounting them. Treat public open/CVR bands as starting points, not guarantees. Start with a Free Klaviyo Audit if you want the gaps mapped on your account.
CartStrings is an e-commerce email marketing agency that executes in Klaviyo (Silver partner). Klaviyo is the platform; the welcome flow is one retention lever we rebuild early because it sets tone for every email that follows. This page is the flow setup canonical. For copy patterns and example angles, use the sibling welcome email examples for Shopify.
What is a Klaviyo welcome series flow?
A welcome series flow is an automated set of emails (and optional SMS later) that fires after a new subscriber joins a list. It greets them while interest is high, delivers what the signup form promised, and nudges a first order without training people to wait forever for a bigger coupon.
Klaviyo ships a default welcome skeleton. Treat that as a floor, not the finished program. Pair this flow with a solid abandoned cart flow so first-purchase intent is covered from both signup and cart angles.
Trigger, filters, and delays
Trigger on Added to List pointed at the same master list your popups, subscribe pages, and Shopify signup paths feed. If the form writes to list A and the flow listens to list B, the series never fires.
- Double opt-in: Klaviyo lists default to double opt-in. Keeping it on for the main list protects deliverability; the subscriber confirms, then enters the flow. Confirm current Klaviyo help docs for your account settings.
- One entry: List-triggered flows typically allow one entry per profile. Set the flow to manual before bulk imports so you do not schedule email one for an entire historical list by accident.
- Delay shape: Email one immediate (or after confirmation). Then space later emails about 1-3 days apart over roughly 7-14 days. Stretch timing for high-AOV / specialty catalogs with longer consideration.
CartStrings POV: Fix list alignment and purchase exclusions before you rewrite five subject lines. Broken trigger + discount spam is the common leak.
Email 1-3 jobs (extend to 4-5 if needed)
Klaviyo's default is often three emails. Many Shopify brands do better with four to five over one to two weeks - more chances to convert without hammering. Jobs stay the same whether you ship three or five:
- Email 1 (immediate) - Deliver + welcome. Keep the promise from the signup form. Offer, brand hello, one clear CTA. This email usually carries most of the series' purchase action when the offer is real.
- Email 2 (day 2-3) - Story + fit. Who you are for, what makes the product different, why this brand. Connection a discount alone cannot buy.
- Email 3 (day 4-5) - Proof. Reviews, bestsellers, UGC, guarantees. Lower first-order risk.
If you extend: Email 4 handles objections (shipping, returns, how-it-works). Email 5 is a last-call on the first-order offer for people who still have not bought - with the exclusion below still on. Example subject/body angles live on the examples canonical.
Free Klaviyo Audit - get a prioritized readout on welcome trigger alignment, offer placement, and purchase splits before you rebuild the whole series.
Exclusions that protect margin
Before you add more emails, confirm:
- People who place an order after entering the flow stop receiving first-order discount reminders (conditional split / filter on placed order since starting this flow).
- Existing customers (has placed order over all time) are not dumped into an identical "here's your first-order coupon" path - split or branch so the message fits.
- Smart Sending or equivalent so welcome touches do not collide with a campaign the same day when that would feel spammy.
- Popup list and flow list still match after any form redesign.
The biggest quiet leak is re-discounting people who already paid full price. Fix that split even if the creative is "good enough."
Shopify realities
Most new profiles arrive through capture forms, not manual adds. Your popup is the front door to this flow - messy consent or a second list breaks welcome silently. High-AOV and specialty catalogs (camera, gear, considered purchases) usually need longer delays and stronger proof than replenishment DTC; do not paste a fashion three-email coupon stack into a slow-cycle catalog and call it done.
Public education materials often show flows carrying a large share of email revenue relative to send volume. That is platform / industry pattern language, not a CartStrings client metric and not a promise for your store. Measure your own welcome placed-order rate and revenue per recipient after the rebuild.
Offers without training coupon waiters
If the form promised a discount, put it in email one. Do not drip the same code in every email. Gate later discount reminders behind "has not purchased since starting this flow." Offer strength should match margin and AOV - a weak code nobody notices and a code that trains intentional waiting are both failures. ASSUMPTION: third-party case studies that quote a single revenue-per-recipient lift for one dollar-off amount are someone else's anecdote until you test on your list.
How to judge performance (no invented client %)
Look at: open and click on email one, placed order rate through the flow window, revenue per recipient, and how often buyers still receive discount emails after purchase (should be near zero if exclusions work).
ASSUMPTION / CartStrings POV: Industry writeups often cite welcome opens much higher than regular campaigns, and first-purchase conversion in a wide band depending on offer and category. Treat any hard "good CVR is X-Y%" you see elsewhere as a conversation starter. Your category, traffic quality, and AOV move the number. We do not invent a CartStrings portfolio revenue share on this page.
If opens are weak, check deliverability and list quality first - see emails going to spam and list cleaning - before rewriting the whole series.
Frequently asked questions
How many emails should a Klaviyo welcome flow have?
Start from Klaviyo's three-email default; many Shopify brands land on four to five over 7-14 days. Match length to consideration cycle and stop when extra emails only add fatigue.
Single or double opt-in?
Keep double opt-in on for the main list in most cases. It confirms real addresses before the welcome series runs and supports inbox reputation.
Where does the discount go?
Email one if you promised it at signup. Then exclude purchasers from later discount reminders so you protect margin.
How long should the series run?
Often about a week to two weeks. Immediate first email; 1-3 days between later ones. Stretch for high-AOV catalogs.
What is a good welcome conversion rate?
ASSUMPTION: published bands vary widely by niche and offer. Use your own baseline, fix exclusions and trigger first, then test offer and proof. No invented CartStrings % here.
Welcome flow vs abandoned cart?
Welcome nurtures new subscribers; cart recovers shoppers who added products or started checkout. Build both. See the abandoned cart setup guide.
Bottom line: Align the list trigger, deliver the promise in email one, prove the brand, exclude buyers from leftover coupons, and measure your own results. For a prioritized readout on your account, take the Free Klaviyo Audit or book a call with CartStrings. Related: welcome email examples, email automations.
