A digital marketing mix is not a list of online channels.
A digital marketing mix is not a list of online channels. Digital changes the offer, price formation, access, communication, measurement and learning speed at the same time. A free feature can be a product, an acquisition channel and evidence of value; a marketplace can expand reach while reducing margin and customer knowledge. The unit of analysis is therefore the system of decisions and feedback loops, not an isolated media budget.
Decision and method.
Select digital levers that create incremental contribution after acquisition, service, discounts, returns and cannibalisation, while retaining learning capacity. Start from the economic behaviour to change: discover, try, buy, upgrade, renew or recommend. For every lever—paid acquisition, content, product, pricing, distribution, onboarding or CRM—state its main role, mechanism and dependency. Compute the full-loop cost: media, discount, commission, creative, technology, fraud, returns and service, less transfers from other channels. Daily signals guide execution; cohort evidence and periodic causal tests govern level changes.
Worked example.
A brand spends €120,000 on paid social and attributes €480,000 in sales, a ROAS of 4. Gross margin is 55%, average discount 12%, returns 14%, service costs €9 on 2,400 orders, and a holdout estimates 62% of sales to be incremental. Incremental sales: 480 × 62% = €297,600. Revenue retained after discount and returns: 297.6 × 88% × 86% = €225,200. Gross margin is €123,900. After €21,600 of service and €120,000 of media, contribution is −€17,700. The attributed ROAS of 4 becomes an incremental contribution ratio of −0.15. Fund the next increment only if incremental contribution per order exceeds €50.
Checks and limits.
Link each metric to a behaviour and contribution; include discount, return, service and commission in one account; subtract transferred sales; regularly calibrate platform metrics with causal evidence. Incomplete identifiers leave customer loops partly unobserved; brand and network effects often outlast the attribution window; an average contribution can conceal profitable and value-destructive segments.
Resources and sources.
Download the digital-mix matrix. Related: e-commerce economics, paid, owned and earned roles, incrementality. Sources: Lemon & Verhoef (2016); Li & Kannan (2014); Berman (2018).