Channel Economics
MER, nMER, channel-specific ROAS targets, and why setting one target for everything makes no sense.
1. MER: The Blended View
Individual channel ROAS is unreliable. Attribution problems, overlap, halo effects. You know this. MER gives you the business-level truth.
If MER is 3.5x and you're profitable at 3.0x, the business is working. Even if Google says 5x and Meta says 1.8x. Stop chasing channel-level accuracy. It doesn't exist.
2. nMER: The Growth Signal
Here's the trap: MER can look great while your business is dying. Returning customers mask a broken acquisition engine. You think you're growing. You're not.
The Hidden Problem
4.0x
Total MER
"Looks great"
1.5x
nMER (new customers only)
"Growth engine is broken"
You're living on past customers. The moment they stop coming back, revenue falls off a cliff.
How to calculate nMER
Use KLAR, Triple Whale, or manual Shopify + GA4 segmentation. The exact tool matters less than having the number.
Healthy target
nMER should sit above your break-even ROAS. Below that, you're acquiring customers at a loss with no LTV plan. That's a bet, not a strategy.
3. Channel-Specific ROAS Targets
Every channel has a different job. Different job = different target.
"Setting one ROAS target for everything is like paying a salesman and a receptionist the same commission. It makes no sense."
| Channel | Target ROAS | Mode | Job |
|---|---|---|---|
| Brand Search | 10-15x | Efficiency | Defend what you've built |
| Non-Brand Search | 2-3x | Growth | Acquire new demand |
| Shopping | 3-5x | Protect | Product-level capture |
| YouTube / Display | 1-2x | Invest | Generate future demand |
| Meta (Prospecting) | 1.5-2.5x | Acquire | Find new customers |
| Meta (Retargeting) | 5-8x | Convert | Close warm audiences |
These are starting points, not rules. Your actual targets depend on your CM2 margin and break-even ROAS. A brand with 55% CM2 margin can afford lower ROAS targets than one with 30%.
4. Channel Orchestration
Google and Meta don't compete. They serve different stages. Treating them as competitors is a mistake.
Meta
Generates demand
Shows your product to people who weren't looking for it. Creates interest. Plants the seed.
Captures demand
Catches people when they search. Converts the interest Meta created. Closes the deal.
The LTV Difference
LTV differs by acquisition channel. Meta customers may have 2.3x better 90-day LTV than Google Shopping customers. Why? Meta finds people earlier in their journey. They build more brand affinity. They come back more often.
Budget allocation should follow LTV, not channel ROAS. Spend where the best customers come from.
The Two-Engine Model
Two engines, one system. Meta fills the top. Google closes the bottom. Neither works well alone.
The CMO Lens
Most brands set one ROAS target and forget about it. A CMO reviews MER and nMER every week, adjusts channel budgets monthly, and makes the call on when to invest in demand creation vs harvest demand capture. That orchestration is where the real leverage lives.
See How This Applies to You
We'll look at your numbers, your channel mix, and tell you where the money is. 30 minutes. No pitch.