You've set up email campaigns, a few automated flows, and your Shopify store is running. But your customers only buy once. Your acquisition cost is soaring. And your revenue remains dependent on paid advertising. This is often a sign that something more structural is missing: a real CRM strategy.
Not a tool. Not software. A strategy.
What exactly is an e-commerce CRM strategy?
CRM stands for Customer Relationship Management. But behind this somewhat corporate term lies something very concrete for an e-commerce brand: how you communicate with your customers, when, through which channel, and with what message.
Today, e-commerce CRM is essential for centralizing customer data, automating marketing journeys, personalizing offers, and building lasting loyalty.
The idea is to stop treating your customer base as a mere file to send newsletters to. It's about building a real relationship that generates value over time. And in a context where acquiring a customer is increasingly expensive, a loyal customer spends up to 67% more than a new customer. Loyalty is therefore not a nice-to-have. It's a pillar of growth.
Why CRM strategy became a priority in 2025
A few years ago, you could still get by with well-targeted Facebook campaigns and a good ROAS. Those days are gone. CPMs are exploding, attribution is becoming more complex with the demise of third-party cookies, and social platform algorithms are becoming increasingly unpredictable.
The observation is clear: profitability is becoming increasingly complex due to rising advertising costs, competition, and attribution issues. The most successful brands share one commonality: an advanced email marketing strategy.
In other words: the brands that are doing best are those that have built a direct relationship with their customers, independent of third-party platforms. And that requires a solid CRM strategy.
The 5 pillars of an effective e-commerce CRM strategy
1. Centralize customer data
It all starts here. Before personalizing anything, you need a complete view of each customer: purchase history, website behavior, email interactions, acquisition channel, average order value...
Unified customer profiles consolidate data from multiple touchpoints to create comprehensive profiles that power personalized marketing campaigns. Without this 360° view, it's impossible to know who you're talking to or what to say to them.
2. Segment your audience precisely
This is the second pillar, and probably the most impactful. According to a study published in 2025 by KPMG and FEVAD, 83% of French consumers are willing to share their data when it is used to provide a truly personalized experience. Your customers want to be recognized. Not bombarded.
Behavioral segmentation is currently the most powerful lever. Specifically, you can segment by purchase frequency, average order value, recency of purchase, products viewed, and engagement level with your emails. Each segment receives a tailored message: loyal customers receive VIP offers, inactive customers receive a re-engagement reminder, and new customers receive a customized welcome sequence.
3. Automate key journeys
A good CRM strategy largely runs automatically. Flows, or automated sequences, handle critical moments in the customer journey without manual intervention. CRM flows generate between 40% and 60% of CRM revenue. This is the transition from reactive marketing to predictive marketing.
Essential flows to implement: the welcome series to greet and engage from the first contact, the abandoned cart flow to recover lost sales, the post-purchase flow to thank, build loyalty and cross-sell, and the reactivation flow to re-engage dormant customers.
4. Drive with data
A CRM strategy that isn't measured doesn't improve. Key metrics to track include: Customer Lifetime Value (CLV) to measure the long-term health of your customer relationships, churn rate to detect problems before they become critical, repurchase rate, and revenue generated by email.
CLV predicts growth opportunities, optimizes marketing spend, and allows you to create targeted experiences for your highest-value segments.
5. Activate multiple channels coherently
Email, SMS, WhatsApp, push notifications: a true CRM strategy doesn't stop at a single channel. The challenge is consistency. The right message, on the right channel, at the right time. Klaviyo centralizes customer data, purchase history, behaviors, and preferences in a single tool. This unified view allows you to trigger the right messages at the right time on the right channels.
RFM: the analysis that changes everything
If you're not yet familiar with RFM analysis, now's the time. RFM stands for Recency, Frequency, Monetary. It's a segmentation method that categorizes your customers based on three criteria: when they last purchased, how often, and for how much.
The result: you quickly identify your best customers to pamper, your at-risk customers to re-engage as a priority, and your inactive customers to reactivate or remove from your list. RFM analysis allows you to create targeted retention flows that prevent churn and increase the repurchase rate.
Klaviyo: the CRM designed for e-commerce
There are many CRM tools on the market. Salesforce, HubSpot, Brevo, ActiveCampaign... But for an e-commerce brand, Klaviyo stands out as the benchmark. Why?
Where a classic emailing tool sends emails, Klaviyo orchestrates growth based on understanding customer behavior. This granularity allows for deep personalization that transforms CRM into a lever for profit, not just a sending channel.
It integrates natively with Shopify, WooCommerce, Prestashop, and Magento. It includes predictive analytics, dynamic segmentation, and multichannel management for email, SMS, and WhatsApp in a single tool. And its segments update automatically in real-time, meaning your messages are always relevant, without manual intervention.
Mistakes to avoid in a CRM strategy
Some common pitfalls we often see during audits:
Sending the same emails to the entire list without segmentation. This is the best way to lower your deliverability and fatigue your audience. Neglecting post-purchase. The first order is the beginning of the relationship, not the end. Forgetting inactive customers. A list that isn't regularly cleaned impacts your performance and sender reputation. And managing without KPIs. Without clear metrics, it's impossible to know what works and what needs to be optimized.
What The Modern Letter concretely does for your CRM strategy
At The Modern Letter, we support e-commerce brands with their entire CRM strategy via Klaviyo: account audit, segmentation, flow construction, campaigns, copywriting, design, and performance tracking.
The approach is simple: no spam, no aggressive promotions. Personalized, elegant, and relevant emails that strengthen your brand image and build a lasting relationship with your customers. By combining automated flows and newsletters, the best brands retain their audience and build a strong community.
And for founders who prefer to upskill internally, The Modern Letter also offers a comprehensive Klaviyo training: 8h37 of content to master the tool from A to Z.
In summary: where to start?
If you're starting from scratch or your CRM is underutilized, here's the order of priorities: start by centralizing your customer data in a suitable tool like Klaviyo. Then set up your basic segments and essential flows. Then progressively refine with RFM analysis, multichannel, and A/B testing.
An effective CRM strategy isn't built in a week. But the first results are often visible in just a few weeks.
