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Topic · Performance marketing
ROAS lies. MER tells the truth.
Definition
MER (Marketing Efficiency Ratio) is total revenue divided by total marketing spend across all channels for a period. ROAS (Return On Ad Spend) is per-channel and platform-reported. MER captures blended performance including organic uplift; ROAS overstates last-click channels and understates upper-funnel.
Services that operate this topic
Service
Full-funnel paid media managed for pipeline and revenue. not impressions. Google, YouTube, LinkedIn, and Meta under one operator.
Service
Fractional CMO embedded in your team. Strategy, execution oversight, and revenue reporting. without the $300K+ full-time cost.
Industries that care about this
Vertical
B2B SaaS
B2B SaaS in 2026 buys through ChatGPT and Perplexity before it ever sees Google. If your brand isn't cited in AI answers, demos don't book.
Vertical
Fintech
Fintech in 2026 lives or dies on regulator-aware content and AI-citation share for regulated queries. DIFC, ADGM, MAS, SAMA — each has rules that shape what content you can publish.
Vertical
DTC e-commerce
DTC in 2026 wins on creative volume, not creative quality. AI pipelines that produce 40-80 vertical-video variants per week beat brands that produce 8.
FAQ
Yes, as a directional channel-level signal. Just never as the sole optimization target. ROAS over-credits brand and remarketing; under-credits awareness.
Sector-dependent. DTC fashion 3-5x. SaaS 2-4x. Marketplace 2-3x. The right benchmark is the one that lets the unit economics work at scale.
MER is the rate; payback period is the time. A high MER with a 12-month payback is a slower-growth profile than a lower MER with a 4-month payback.
Yes, but it is noisier than monthly. Weekly MER is useful as a trend signal; monthly is more reliable for decision-making.
Yes, but the revenue side must include downstream-pipeline-to-closed-won conversion at the right lag. Otherwise the lookback window flatters early-stage spend.
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