Fashion ecommerce measurement that tells you what drives sales

Marketing mix modeling (MMM) for fashion ecommerce is a statistical approach that measures the incremental revenue impact of every media channel, correcting for the biases in platform-reported ROAS. Media typically drives 20 to 40% of total sales in fashion ecommerce, and MMM accounts for seasonality, promotions, and campaign type to give a single, trustworthy ROI metric across the full media mix.

Platform-reported ROAS overstates some channels and understates others by design, since every platform takes credit for sales it did not necessarily drive. Sellforte applies incrementality factors from continuous MMM and lift experiments back to attribution, producing true incremental ROAS at campaign and ad-set level every day, rather than click-based credit assignment.

Coupons, category promos, season sales, and mass discount events are major revenue drivers in fashion ecommerce and can easily distort media measurement if left unmodeled. Sellforte explicitly models promotional mechanics alongside seasonality and temperature effects, so reported media ROI reflects what media actually drove rather than what coincided with a discount event.

Yes. Sellforte delivers incrementality-corrected ROAS at campaign and ad-set level on a daily and weekly cadence, matching how fashion ecommerce performance teams actually operate. Budget recommendations are available at three levels simultaneously: campaign, channel allocation, and weekly pacing.

Sellforte's Experiments Hub unifies Geo Lift tests, Conversion Lift studies, and A/B tests in one place. Every result feeds back into the MMM as a Bayesian prior, so the model becomes more accurate with each experiment rather than treating tests as one-off projects disconnected from the core measurement system.

Sellforte models marginal response curves for every channel in the media mix, showing exactly where each channel sits on its saturation curve. This reveals which channels still have room to scale, which are already saturated, and what the next dollar invested in each one would actually return, rather than relying on blended ROAS.

Sellforte is built for enterprise deployment, with secure data infrastructure supporting integrations across ad platforms, ecommerce platforms, and data warehouses. Full details on data handling and access controls are available on Sellforte's Security page.

Most customers are live and seeing model outputs within a few weeks of starting onboarding. From that point, the platform runs continuously rather than on a quarterly cycle, so optimization recommendations are available from the first model run.