Grow or Slow Channel Review
Classify channels by trajectory, then adapt investment to the underlying cause
- Difficulty
- Easy
- Time to result
- ~days to results
- Steps
- 6
- Confidence
- 98%
Grow or Slow is a rapid channel-review framework that forces marketers to state a directional thesis for every important part of their mix. Each channel is classified as growing, slowing, or remaining stable, followed by a short explanation of the forces driving that trajectory. The review then distinguishes aggregate market direction from the opportunity available to a particular brand. For example, total spending may decline while lower competition improves economics for capable advertisers, creating an arbitrage rather than a reason to exit. Teams translate each judgment into an investment posture: increase, defend, test, selectively exploit, or reduce. They also define signals that would prove the thesis wrong. The output is a concise, revisable portfolio of channel decisions grounded in mechanisms rather than fashionable predictions.
Origin
Extracted from Marketing Against the Grain's “Grow or Slow” prediction game, in which the hosts rapidly evaluated marketing channels and explained the mechanism behind each judgment.
Core principles
- 01Channel trajectories differ as markets and technology change
- 02A declining channel can still offer an efficiency opportunity
- 03Growth in consumption and growth in advertiser value are not identical
- 04The reason behind a trajectory matters more than the label alone
How to run it
- 1
Build the channel list
Record every channel receiving meaningful budget, staff time, or strategic attention.
Pro tip Include emerging channels and declining channels that competitors may be leaving.
Watch out Do not limit the review to paid media.
- 2
Assign a trajectory
Classify each channel as grow, slow, or stable over the planning period.
Pro tip Make the time horizon explicit so the label has operational meaning.
Watch out Avoid using “stable” merely because the team lacks an opinion.
- 3
Explain the mechanism
Identify the demand, supply, cost, technology, regulation, or behavior change expected to drive the trajectory.
Pro tip Use one or two falsifiable sentences rather than a vague trend claim.
Watch out A label without a causal explanation cannot guide investment.
- 4
Find the brand-specific angle
Determine whether the market-wide direction creates a different opportunity for your brand, such as cheaper inventory in a declining market.
Pro tip Separate total channel volume from the performance available to skilled participants.
Watch out Do not assume a slowing market automatically means poor returns.
- 5
Choose an investment posture
Decide whether to increase, defend, test, exploit selectively, or reduce investment based on the trajectory and brand-specific economics.
Pro tip Attach a budget range and owner to each decision.
Watch out Do not make sweeping reallocations without validating current unit economics.
- 6
Schedule a reassessment
Define evidence that would confirm or invalidate the judgment, then revisit it at the next planning cycle.
Pro tip Monitor leading indicators such as CPMs, reach, conversion quality, and audience behavior.
Watch out Predictions become liabilities when teams refuse to update them.
In the wild
A team expects overall Facebook advertising demand to slow as companies reduce spending. Instead of exiting automatically, it monitors CPMs and discovers that reduced competition improves its own acquisition economics. The team classifies the market as slowing but its brand-specific opportunity as selectively attractive.
→ The company captures efficient inventory while competitors withdraw indiscriminately.
A brand classifies YouTube as growing because long-form video remains valuable, short-form video is expanding, and regulatory pressure could weaken TikTok temporarily. It assigns additional production resources while tracking audience growth and qualified demand.
→ Investment follows a stated mechanism with measurable validation signals.
Common mistakes
Treating the label as the decision
“Grow” or “slow” describes the market thesis; the brand's economics determine the actual investment response.
Ignoring countercyclical arbitrage
A channel can shrink overall while becoming cheaper and more productive for the remaining participants.
Failing to revisit predictions
Channel conditions change quickly, so every classification needs disconfirming evidence and a review date.
Is it for you?
Best for
It is best for marketing teams reviewing their media mix during annual or quarterly planning.
Not ideal for
It is not ideal as a substitute for channel economics, customer evidence, or controlled testing.
From the transcript
“do we think they're gonna grow or do we think they're gonna slow in 2023 with like a one or two sentence answer as to…”
“I think the number of events slows, I think the events that do exist will grow because people are still coming off of a pandemic…”
“I think it slows overall because last companies spend money on Facebook. But I think it grows for the brands who use Facebook 'cause CPMs…”
From the episode
7 Marketing Trends & Opportunities for 2023