How do synergy effects between channels influence budgeting?

• A. Synergy effects are negligible and can be ignored
• B. Cross-channel relationships are linear and predictable
• C. Combined channel effects can exceed the sum of separate effects; budgets should account for cross-channel benefits
• D. Each channel should be budgeted independently with no cross-effects

Answer: (C)

Synergy between channels means the combined effort can produce more impact than simply adding each channel’s individual results. When channels support one another, their effects amplify: awareness from one channel can boost search and direct response, while retargeting and email can convert more effectively when paired with broader campaigns. Because of these cross-channel interactions, the total outcome of a coordinated budget often exceeds what you’d expect from separate spends. So budgets should reflect these cross-channel benefits, allocating funds to integrated campaigns and using attribution or modeling to estimate the incremental lift from combined investments.

Ignoring synergy risks missing opportunities to amplify results, while assuming cross-channel effects are linear and predictable is usually unrealistic due to non-linear dynamics and saturation. Budgeting each channel in isolation fails to capture how they strengthen each other.