Identify methods to spot and diagnose channels or campaigns destroying value.
Negative ROI detection flags channels where incremental profit minus spend drops below ______.
margin
CPC
zero
CTR
Profit <0 indicates campaign costs exceed value generated and should be paused or re‑optimised.
Plotting marginal ROI curve helps detect negative ROI zones when slope turns ______.
positive
infinite
flat
negative
Downward slope below zero shows each extra dollar destroys value.
Bayesian posterior ROI <0 with 95% credible interval entirely below zero indicates ______ certainty of loss.
medium
low
high
zero
Entire distribution below zero leaves little doubt channel is value destructive.
2025 Robyn issued a dashboard tile labeling channels with negative ROI as ______ in red.
Underperforming
Hero
Benchmark
Premium
Colour-coded alert draws attention for quick decisioning.
Before cutting spend, analysts should verify negative ROI isn't caused by mis‑attributed ______.
cookie sync
pixel fire
baseline shift
font
Baseline increase unrelated to media could mask true lift; double‑check controls.
Channels with high fixed fees can show negative ROI at low spend; increasing spend may cross break‑even due to ______.
cookie inflation
bounce
economies of scale
negative CTR
Spreading fixed costs across more conversions can flip ROI positive.
Negative ROI detection requires costs and revenue on the same ______ basis (gross vs net).
device
cookie
accounting
viewport
Mismatch inflates or deflates ROI calculations erroneously.
Time series outlier removal should occur before ROI analysis to avoid false ______ ROI spikes.
negative
positive
neutral
cookie
One‑off glitches can produce misleading negative returns.
If negative ROI persists, consider reallocating to channels with positive ROI and high available ______.
dopamine
font
scalable headroom
bounce
High headroom channels can absorb budget efficiently.
ROI below zero but CLV‑weighted ROI positive could indicate channel is profitable for ______ customers.
one‑time
bot
high‑value
low‑value
Targeting elite segments may justify continued spend despite headline negatives.
Starter
Review the basics.
Solid
Nice work—refine the details.
Expert!
Exceptional command of the topic.
