.avif)
TL;DR: Klaviyo segments sort your list into live groups so the right people get the right email. Seven cover almost every store: engaged subscribers, new subscribers, first-time buyers, repeat buyers, VIPs, at-risk customers, and unengaged profiles. Build these first, map each one to a real send, and you protect deliverability while lifting revenue. Everything past those seven is a nice-to-have, not a need.
Klaviyo segments are live, rule-based groups of subscribers that update on their own, and for a Shopify brand they decide who gets each email, when, and why. Send the same blast to everyone and two things go wrong. Your best customers get generic messages, and your dead weight drags down your open rate until inbox providers start routing you to spam.
The fix isn't dozens of clever segments. It's a short list of the ones that actually change what you send. Klaviyo's own segmentation data shows highly segmented sends earn more than 3x the revenue per recipient of unsegmented ones, $0.19 versus $0.06, with almost double the open rate.
Across the Shopify stores we manage at CartStrings, the accounts leaking the most money aren't missing fancy automations. They're blasting a bloated list because nobody built the seven segments below. This guide covers each one, the rules to use, and how many your store actually needs.
What is a Klaviyo segment?
A Klaviyo segment is a live group of profiles that match rules you set, and it updates in real time as people qualify or drop out. A list is static and someone has to be added to it. A segment is dynamic and manages itself.
Say you build a segment for "opened an email in the last 30 days." As people open, they join. As they go quiet, they fall out. You never touch it again. That's the power of a segment over a plain list. You can send a one-off campaign to a segment, and you can trigger a flow off one too, so the same rule can power both your calendar and your automations.
Lists still have a place, mostly for opt-in sources like your newsletter signup or a specific event you ran. But the day-to-day work of deciding who gets what should happen in segments, because they react to behavior while a list just sits there. Once you make that switch, you stop managing your audience by hand and start letting the rules do it.
Why segments make money
Segments make money because relevance lifts revenue and deliverability at the same time. Klaviyo's benchmark data shows highly segmented sends earn 3x the revenue per recipient of unsegmented blasts and cut the unsubscribe rate in half. Fewer complaints means better inbox placement, which means more of every future email gets seen.
That second half is the part most stores miss. When you send mainly to people who want to hear from you, spam complaints drop and opens rise. Inbox providers read those signals and reward you with the inbox instead of the promotions tab. Segmentation is one of the cheapest ways to protect your deliverability.
It's also why behavior-based automations pull an outsized share of email revenue for most brands. A welcome flow or an abandoned-cart flow is really just a segment plus a trigger, and because each one reaches the right person at the right moment, a small slice of automated sends tends to drive a large share of total email revenue. Segmentation is the engine underneath all of it. Get the segments right and every other part of your program gets easier.
The 7 core Klaviyo segments
These seven cover the decisions that matter for almost any Shopify store. Build them in this order.
- Engaged subscribers. Anyone who opened or clicked in the last 30, 60, or 90 days. New Klaviyo accounts get 30-, 60-, and 90-day engaged segments by default. This is your main campaign audience, and almost everything on your calendar should go here unless you have a deliberate reason to reach wider. Start at 60 days for most stores, and tighten to 30 if your sender reputation is shaky.
- New subscribers. Joined in the last 30 days and haven't purchased yet. They're warm but unproven, so give them your welcome content and a reason to make a first order. If this segment is small, your popup is the lever to fix first.
- First-time buyers. Exactly one order. The biggest lever in ecommerce is turning one purchase into two, so pull these people out and send a second-purchase nudge or a cross-sell before they forget you.
- Repeat buyers. Two to four orders. They're proven but not yet loyal. Reward the behavior and push them toward VIP status with early access and thank-you sends.
- VIPs. Your best customers by spend or order count, for example 5 or more orders or $500-plus lifetime with a purchase in the last 90 days. They're usually 3 to 8% of your list but drive a large share of campaign revenue. Give them real perks, not the same 10% off everyone gets.
- At-risk customers. Bought before but have gone quiet past their normal buying cycle. If people usually reorder every 60 days, flag them at 75 to 90. Catch them with a win-back flow before they're gone for good.
- Unengaged profiles. No open or click in 90 to 120-plus days. This is a deliverability segment, not a revenue one. Suppress them from regular campaigns and run a short sunset sequence to win back the few who are salvageable.
Advanced Klaviyo segments
Once the seven basics are running, Klaviyo's predictive analytics and RFM add another layer of targeting.
Klaviyo builds a predicted lifetime value, a churn risk score, and an expected next-order date for each customer once you have at least 500 customers who placed an order, an ecommerce integration, and 180 days of order history. Use predicted CLV to spot high-value customers before they've spent much, and use churn risk to trigger a save. One caveat: these predictions work best across a group, not for any single person, so segment on them rather than acting on one profile. Fewer than 20% of Klaviyo accounts use predicted CLV for segmentation, so it's still an edge.
RFM stands for recency, frequency, and monetary value. Klaviyo has a built-in RFM dashboard that buckets customers into groups like Champions, At Risk, and Hibernating. It's a fast way to build the value segments above without writing every rule by hand.
How many do you need?
Most Shopify stores need about seven segments, not forty. A segment you never send to is just a saved search. If a segment doesn't change who gets an email or what that email says, delete it.
The common mistake is collecting segments like trophies. Build one per real decision instead. Then scale with revenue. Under $500k, the seven basics plus a signup-source segment are plenty. Past $500k, add category and browse segments so you can send by interest. Past $2M, layer in the predictive segments above. Every new segment should earn its place by mapping to a specific campaign or flow.
A good gut check: for each segment, can you name the exact email or automation it feeds? If you can't, you don't have a targeting tool, you have a report. Reports are fine to look at, but they don't move revenue. The segments that move revenue are the ones you send to on a schedule.
Common segment mistakes
Three mistakes show up in almost every account we audit. The first is a bloated engaged segment. If your definition reaches back 300 or 800 days, you're calling ghosts "engaged" and mailing them anyway, which quietly erodes your reputation. Keep the window tight, usually 30 to 120 days depending on how often people buy.
The second is one-condition segments. A segment defined only by "is subscribed" isn't targeting anyone. Klaviyo's top-performing sends use two or more conditions and always bound behavior by time, so pair a behavior with a timeframe. The third is building segments you never use. If it isn't wired to a campaign or a flow, it's clutter, not strategy. Fewer, sharper segments beat a long list of saved searches every time.
How to build a segment
In Klaviyo, go to Audience, then Lists & Segments, and click Create Segment. Add a definition using options like "Properties about someone" or "What someone has done," such as placed an order or opened an email.
Use at least two conditions and always bound behavior by time, like the last 30, 60, or 90 days. Preview the size as you go. Klaviyo suggests keeping a campaign segment under 20% of your list for tight targeting, so if yours is larger, add a condition to narrow it. Save it, then attach it to a campaign or a flow. A segment that isn't wired to a send is doing nothing.
Put your segments to work
Segments are only worth building if you send to them. The seven above cover the decisions that matter: who's engaged, who's new, who bought once, who buys often, who's your best, who's slipping, and who's dead weight. Build those, map each to a campaign or a flow, and you'll send fewer emails that do more.
If your list is one big blast right now, start with the engaged segment today and add the rest over a week. Or if you'd rather have it built and running for you, a Klaviyo audit is where we start with every store we take on. Want a second set of eyes on your setup? Book a call.
Frequently Asked Questions
What's the difference between a list and a segment in Klaviyo?
A list is static, so people are added and stay until you remove them. A segment is dynamic and updates on its own as profiles match or stop matching your rules. Most of your sending should target segments, not lists.
How many segments does a Shopify store actually need?
About seven to start: engaged, new, first-time buyers, repeat buyers, VIPs, at-risk, and unengaged. Add more only when a new segment changes who gets an email or what it says. A segment you never send to isn't worth keeping.
What is an engaged segment in Klaviyo?
It's everyone who opened or clicked an email in a set window, usually the last 30, 60, or 90 days. Sending mainly to this group keeps open rates high and protects your sender reputation. New Klaviyo accounts get 30-, 60-, and 90-day engaged segments by default.
How do I create a VIP segment in Klaviyo?
Build a segment with rules like placed 5 or more orders, or spent over a set lifetime amount, plus purchased in the last 90 days. Keep the threshold high enough to feel exclusive but not so high that only a handful qualify. VIPs are usually 3 to 8% of a list.
Does segmentation improve email deliverability?
Yes. Sending to engaged segments and suppressing unengaged profiles lowers spam complaints and unsubscribes, which inbox providers read as positive signals. Klaviyo's data shows segmented sends cut the unsubscribe rate compared with blasting the full list.
