Paid media, SEO, email and CRO working together to improve ROAS, reduce CAC, and grow LTV – not just topline revenue. Strategy-led ecommerce marketing for DTC brands who know their numbers.
The primary paid media efficiency metric. Improving ROAS means more revenue per pound spent – but only meaningful if your blended MER is also healthy.
What it costs to acquire a new customer across all channels. The number that determines whether your paid media is profitable at current AOV and margins.
Total revenue from a customer across their relationship with your brand. Higher LTV means you can afford a higher CAC – and most ecommerce brands are leaving LTV money on the table.
Total revenue divided by total marketing spend. The blended metric that tells you whether your marketing programme is working as a whole – not just individual channels in isolation.
The pattern is consistent: a brand finds a winning creative on Meta, scales spend, CAC rises as the audience saturates, ROAS drops, and the playbook runs out. The solution isn’t to find the next winning creative – it’s to build a full-funnel system where each channel does its job and they reinforce each other.
Paid media acquires customers. Email and retention compounds their value. SEO and content reduce dependence on paid over time. CRO improves the conversion rate so every channel performs better. When they’re all aligned around the same unit economics, the brand can scale without margin erosion.
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The creative testing cadence isn’t keeping up with audience fatigue. New angles and formats need to be in the pipeline before performance drops – not briefed in response to it.
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First purchase economics look marginal because there’s no email programme converting one-time buyers into repeat customers. Improving retention changes the CAC maths entirely.
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A 1% improvement in CVR across all channels is the equivalent of a 1% reduction in CAC across every campaign. CRO is the highest-leverage lever most ecommerce brands ignore.
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Turn off the ads and revenue stops. SEO and email should be reducing paid dependence month by month – building a marketing mix where organic channels carry increasing weight.
Each channel has a specific role in the unit economics. Paid acquires, email retains, SEO compounds, CRO amplifies. They need to be managed together – not briefed separately to separate agencies.
Full-funnel Meta and Google Shopping campaigns built around target CAC and LTV:CAC ratio. Prospecting, retargeting, and dynamic product ads structured to acquire new customers at the right cost – with creative testing cadence built into the programme.
Target ROAS CAC by channel Blended MER New vs returning
Full lifecycle email and SMS programme covering welcome, post-purchase, win-back, and VIP flows, plus broadcast campaigns. Repeat purchase rate and LTV are the primary metrics – not open rates.
Repeat purchase rate LTV by cohort Email revenue % Payback period
Technical SEO, category and product page optimisation, and a content strategy that captures commercial search intent. The goal is a growing share of revenue from organic search, reducing CAC and MER as the brand matures.
Organic revenue % Category rankings CAC reduction MER improvement
PDP optimisation, checkout flow analysis, A/B testing, and landing page improvements that improve conversion rate across all traffic sources simultaneously. A 1% CVR improvement is a 1% CAC reduction across every paid channel.
CVR by source AOV Add-to-cart rate Checkout completion
The sequence matters as much as the deliverables. Tracking and attribution first, then acquisition, then retention, then compounding.
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AOV, margin, CAC by channel, LTV by cohort, MER, repeat purchase rate. The starting point for any strategy – understanding the current unit economics before deciding which lever to pull first.
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Server-side pixel, CAPI, Enhanced Conversions, and a channel attribution model that gives an accurate read on where revenue is actually coming from. The prerequisite to any optimisation work.
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Full-funnel paid media across Meta and Google Shopping, with a structured creative testing programme, Performance Max management, and weekly optimisation against target ROAS and CAC.
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Welcome, post-purchase, abandoned cart, win-back, and VIP flows built and optimised. Broadcast strategy aligned to the paid media calendar. Revenue from email tracked as a percentage of total.
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Technical audit, category and product page optimisation, and content targeting commercial search intent. Priority given to terms that convert – not terms with high search volume but low purchase intent.
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Monthly reporting covering blended MER, CAC by channel, LTV by cohort, organic revenue percentage, repeat purchase rate, and CVR. One report, all channels, connected to margin.
Tracking and attribution before anything else. Acquisition optimised before retention is added. Retention compounding before CRO investment is scaled. The sequence is the strategy.
Full audit of current unit economics – CAC by channel, LTV by cohort, MER, repeat purchase rate, CVR by source. Tracking verified across all channels before any campaign changes are made.
Unit economics audit Tracking audit Attribution review Channel assessment
Paid media restructured around target CAC and LTV:CAC ratio. Creative testing programme launched. Google Shopping and PMax reviewed. Meta retargeting audiences segmented by intent level. Email flows audited and priority automations fixed.
Campaign restructure Creative testing Shopping optimisation Email flows
Full lifecycle email and SMS programme live. Repeat purchase rate and LTV by cohort tracked monthly. CRO audit completed. SEO audit completed with a 90-day roadmap. Blended MER reviewed monthly.
Lifecycle email LTV tracking CRO audit SEO roadmap
Paid media scaled incrementally against proven CAC targets. Creative refresh cycle maintaining performance as audiences mature. Email revenue percentage growing. Organic traffic building as SEO compounds.
Paid scaling Creative refresh Organic growth Quarterly MER review
Placeholder figures – replace with real client results once approved for case study use.
4.8x
Average blended ROAS
across paid channels
–29%
Average reduction in CAC
within 90 days
+67%
Average increase in LTV
after email programme launch
A 3:1 LTV:CAC ratio is the standard benchmark for a sustainable ecommerce business – meaning you recover your acquisition cost three times over the customer lifetime. The right target depends on your margin, category, and payback period tolerance – which is exactly what the audit establishes.
Platform-reported attribution is always inflated – every channel claims credit for the same purchase. The approach here is to reconcile platform data against actual Shopify or backend revenue using a blended MER model: total revenue divided by total marketing spend across all channels.
The full programme makes most sense for brands doing £50k+ per month in revenue with meaningful paid media spend. Below that threshold, the channel mix is usually narrower and the engagement is scoped accordingly.
PMax is used deliberately rather than as a default. It performs well when an account has strong conversion data, a well-structured product feed, and good creative assets. In accounts where those conditions aren’t met, Standard Shopping and Search campaigns usually outperform PMax.
Yes – tracking and attribution setup covers Shopify, WooCommerce, Magento, and custom platforms. Klaviyo is the preferred email platform for ecommerce; Mailchimp and others are supported where they’re already in use.
Specialist agencies optimise their channel in isolation. When all channels are managed together with shared commercial targets, budget allocation decisions are made on actual marketing efficiency rather than whichever channel reports the best-looking numbers.
A 30-minute call covering your current CAC, LTV, MER, and channel mix – and an honest assessment of which lever will move the needle most for your specific business.
Strategic marketing consultancy. Liverpool, working with ambitious brands across the UK.
Copyright © 2026 Rob Russell. All rights reserved.
Strategic Marketing Consultant · Liverpool
