> For the complete documentation index, see [llms.txt](https://wiki.anatomyofmarketing.org/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://wiki.anatomyofmarketing.org/the-aom-model/layer-two-fundamentals/data-and-insights/performance-intelligence/marketing-effectiveness.md).

# Marketing Effectiveness

### What is it?

Establish what marketing activity actually caused, and where to invest next. Includes marketing mix modelling, attribution, incrementality and lift testing, test-and-learn routines, media effectiveness, and channel scorecards.

***Also known as:*** *Marketing effectiveness, performance measurement, marketing mix modelling, MMM*

### Why it matters

Spend without causality is spend without accountability. Marketing Effectiveness moves the organisation beyond reporting on outputs (impressions, clicks, leads) to understanding which activity drove real commercial results and by how much. This is what makes the case for marketing investment credible at board level and what enables smarter allocation across channels, campaigns, and time horizons.

### When it matters most

Marketing Effectiveness is most critical during budget setting and reallocation cycles, when the business needs to justify or defend marketing investment, when channel mix decisions are under review, or when there is pressure to cut spend and the organisation needs evidence to protect what is working. It is also essential when scaling activity, to ensure growth is driven by genuine effectiveness rather than increased spend alone.

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### AoM Connected Tools

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