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Incrementality Notebook

Incrementality in advertising is the revenue a campaign actually causes, not the revenue it happens to sit next to. Move the sliders on a hypothetical account below and watch blended ROAS and cold ROAS pull apart.

Incrementality notebook · hypothetical accountMismatch flagged
Notebook margin notes
Lesson 1 · Someone who already chose you is cheap to convertA branded click comes from a person who typed your name into the search bar. A high branded ROAS multiple is not proof the campaign found new demand, it is proof brand recognition already existed before the click.
Lesson 2 · Averages hide the mixBlended ROAS folds cheap branded revenue and harder-won cold revenue into one number. Move total spend or the branded share and watch the blended figure drift away from the cold figure below.
Lesson 3 · Scale decisions belong to the cold numberBreak-even is the real bar for a scale-up decision. Ask what the cold ROAS says before adding budget, not what the blended ROAS says, or you risk funding brand recognition and calling it growth.
Blended ROAS (3.50x) clears your 2.5x break-even and would greenlight more budget. Cold ROAS (2.0x) sits below that same line. Scale on the blended number here and this hypothetical account funds branded lift, not new demand.
Blended ROAS3.50xtotal revenue ÷ total spend
Branded ROAS12.00xcold ROAS × branded multiple
Cold ROAS2.0xthe number scale calls belong to
Revenue from branded$36,000$3,000 of hypothetical spend
Revenue from cold$34,000$17,000 of hypothetical spend

This whole notebook runs on numbers you moved, not industry benchmarks. Plug in your own account and the split can look completely different. A free audit checks what your real branded and cold split actually says.

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How to read the notebook

Operator secretBlended will always sit between branded and cold, never below cold
As long as branded share is above zero, blended ROAS is a weighted average pulled up by branded performance. That means blended ROAS can clear a break-even line that cold ROAS misses entirely, and the account still looks fine on the dashboard that only shows the blend.

The five sliders build a hypothetical account, none of the numbers are benchmarks or a claim about what your account looks like. What matters is the relationship: raise the branded share or the branded multiple and the blended stat drifts upward while cold ROAS stays exactly where it was. That gap is the whole argument for checking incrementality before approving a budget increase.

For the steps to find this split in your own account, see the branded search ROAS check. Once you know your real cold ROAS, compare it against the break-even ROAS table for your margin, not the blended account average.

FAQ

What is incrementality in advertising?

Incrementality is the revenue an ad campaign actually causes, on top of what would have happened anyway. A branded search ad shown to someone already typing your name did not create that sale, it captured a click on a purchase that was largely already decided. Cold ROAS is the closer read on incremental impact because it measures people who had not already chosen you.

Why does branded search inflate ROAS?

Branded clicks are cheap and convert at a high rate because the person already knows and wants your brand, so the ROAS on that spend runs far above cold acquisition. Blend that number into the account average and the total looks stronger than the part of the account actually finding new customers.

How do I check my own branded and cold split?

In Google Ads, segment search campaigns by brand vs non-brand keywords, or use a branded negative keyword list on your non-brand campaigns so the split reports cleanly. Compare non-branded ROAS against your break-even line separately from the blended account total. The branded search check walks through the exact steps.

Is branded search bad?

No. Branded search protects revenue that competitors would otherwise intercept and it is usually cheap to run. The mistake is not running branded campaigns, it is judging scale decisions by a blended number that branded search is quietly propping up. Keep branded spend, just read it separately from cold.