Every month, we sit down with a new client who wants to be everywhere. Google Ads, Meta, LinkedIn, TikTok, Snapchat, YouTube, programmatic display. They’ve seen competitors on these platforms. They’ve read articles about omnichannel marketing. They’ve had a board member ask why they’re not on TikTok yet. And they’ve got a few thousand pounds a month to make it all happen.
Here’s what I tell them: you don’t have a channel problem. You have a maths problem. And until you solve the maths problem, adding more channels won’t grow your business. It will actively hurt every channel you’re running.
Every Platform Has a Minimum Entry Price
Modern advertising platforms are powered by machine learning. That sounds impressive until you understand what it actually means for your budget. These algorithms learn by processing conversion data. The more conversions they see, the better they get at finding people like your converters. Without enough data, they’re guessing. And guessing is expensive.
Every platform has a learning phase. Meta calls theirs exactly that. Google has a similar concept baked into Smart Bidding. LinkedIn’s algorithm needs time and volume before it can optimise targeting. The principle is the same everywhere: the platform needs to see enough conversions to build a reliable picture of who your ideal customer is and how to reach them efficiently. Below that threshold, your campaigns are permanently stuck in a state where the algorithm can’t do its job. Ads that exit the learning phase properly see meaningfully lower costs per conversion than those that don’t. That’s not a marginal difference. It’s the difference between a campaign that works and one that bleeds money.
The specifics vary by platform, by industry, and by your cost per conversion. But the principle is universal. Every channel has a minimum level of spend below which it simply cannot function as intended. And for most businesses with modest budgets, that minimum is higher than they expect.
Dilution Disguised as Diversification
Here’s where it goes wrong. A business with a limited monthly budget decides to run three or four channels because they’ve been told multichannel is essential. They split the budget roughly evenly. Each channel gets a fraction of what it needs.
On every platform, the same thing happens. The budget is too thin for the algorithm to gather enough conversion data. Campaigns get stuck in their learning phase. Costs stay high because the platform can’t optimise. Performance looks mediocre across the board, not because the channels don’t work, but because none of them ever had enough fuel to get going.
Three months later, the business looks at the results and concludes that “paid media doesn’t work for us.” It does work. They just never gave any single channel enough investment to prove it.
You haven’t tested three channels. You’ve starved three channels. There’s a significant difference between those two things.
“You haven’t tested three channels. You’ve starved three channels.”
You Can’t Trust Thin Data
There’s a subtler problem beyond algorithm performance. When you spread budget too thin, you can’t trust your own data.
Drawing meaningful conclusions from marketing data requires enough volume to distinguish real patterns from random noise. When a channel is generating a handful of conversions per month, you can’t tell whether a campaign is genuinely underperforming or simply hasn’t had enough volume to show its true colours. You’ll make decisions based on what amounts to a coin flip, cutting campaigns that might have worked and scaling ones that got lucky.
This is the hidden cost of dilution. It’s not just that each channel underperforms. It’s that you lose the ability to trust the data entirely. You can’t optimise what you can’t measure, and you can’t measure what you haven’t properly funded.
“You can’t optimise what you can’t measure, and you can’t measure what you haven’t properly funded.”
The Case for Going Deep Before Going Wide
Concentrating your budget on one or two channels isn’t a conservative strategy. It’s the aggressive one. You’re choosing to compete properly in the places where you advertise rather than showing up weakly across five platforms.
When you put your full budget behind a single channel, you get through the learning phase faster. The algorithm has enough data to optimise. You start seeing which audiences, creatives, and campaign types actually perform. You build a genuine understanding of your cost per acquisition and return on ad spend. And you reach a point where you can make informed, confident decisions about what to do next.
Within two to three months of focused spend, you’ll know whether a channel is genuinely viable for your business. You’ll have meaningful data. You’ll have optimised campaigns. And you’ll have a real baseline that you can use to decide whether it’s time to expand or time to push harder on what’s already working.
“Concentrating your budget on one or two channels isn’t a conservative strategy. It’s the aggressive one.”
Research from the Ehrenberg-Bass Institute examined multi-platform campaigns and found a telling pattern: a spirits brand running 14 different activities across eight media channels discovered that more than half of its total reach came from just one activity. Only four of the 14 were needed to achieve the vast majority of their reach. The remaining ten contributed almost nothing incremental. More channels doesn’t automatically mean better results. Often, it means paying more to achieve less.
Saturation is Further Away Than You Think
One of the most common objections I hear is “but we’ve already maxed out this channel.” In almost every case, they haven’t.
Saturation, the point where additional spend genuinely stops generating positive incremental return, is usually much further away than businesses assume. There are more keywords to target, more audience segments to test, more creative variations to run, and more campaign types to explore within a single platform long before the maths demands you go elsewhere. The 3 digital metrics every business owner should track provide the foundation for knowing where you actually stand.
“The urge to expand usually comes from boredom or anxiety, not data.”
The urge to expand usually comes from boredom or anxiety, not data. The channel is “working,” so it feels like it should be left alone while you try something new. But a channel that’s working is a channel that deserves more investment, not less. If your cost per acquisition is profitable and you haven’t exhausted the platform’s targeting options, the smartest move is almost always to scale what’s already proven before splitting your attention.
The 80/20 Rule and Its Limits
You’ll hear people suggest an 80/20 approach. Keep 80% of your budget on the channel that’s working and allocate 20% to testing something new. In theory, this balances exploitation with exploration. In practice, the maths often doesn’t support it.
The 80/20 split only works if the 20% is actually enough to clear the minimum effective threshold for the channel you’re testing. At higher budgets, it can be. That 20% might be enough to run a meaningful experiment for a few months and draw real conclusions.
But at lower budgets, 20% is pocket change. It’s below the threshold where any platform can function properly. You haven’t allocated a test budget. You’ve allocated a donation to the ad platform with no hope of learning anything useful in return.
The honest answer at lower spend levels is: you don’t have enough to test a new channel yet. And that’s not a failure. It’s a reality. Keep building on what’s working. The time for expansion will come when your revenue growth (driven by your successful primary channel) increases the total marketing budget to a level where experimentation becomes viable. That’s how businesses build an effective multi-channel marketing strategy: sequentially, not all at once.
Shiny Object Syndrome is Real
There’s a reason businesses spread too thin, and it’s not stupidity. It’s psychology.
MarketingProfs identified a pattern they call “shiny object syndrome,” driven by marketing FOMO. A competitor launches TikTok ads. An industry conference speaker raves about programmatic display. A LinkedIn post goes viral about Snapchat’s ROI for Gen Z targeting. Suddenly, the channel you’ve been running profitably for six months feels boring and old. The new thing feels urgent.
This isn’t strategic thinking. It’s anxiety dressed up as innovation.
The businesses that build durable marketing performance aren’t chasing every new platform. They’re the ones that have mastered the fundamentals on one or two channels before expanding. They didn’t start by being everywhere. They started by being dominant somewhere.
If you’re spending time wondering whether you should be on TikTok, ask yourself first: have you genuinely maximised the channel you’re already on? Have you tested every audience segment, every creative angle, every campaign type available to you? In most cases, the answer is no. And that means the biggest opportunity isn’t on a new platform. It’s sitting right in front of you on the one you’ve already proven works.
How to Think About Channel Expansion
Rather than chasing a magic number of channels, let your budget and your data guide the decision.
If your budget is modest, one channel is the right answer. Choose the platform most likely to reach your audience with commercial intent. For most B2B companies, that’s paid search on high-intent terms. For e-commerce, it might be Meta or Google Shopping. For professional services, it depends on your audience and offer. You can explore the best advertising platforms to inform that initial decision, but the critical thing is to pick one and commit. Give it at least three months of properly funded spend before evaluating.
As your budget grows (ideally because channel one is generating profitable returns), you can start thinking about a second platform. But only when you can fund it properly without starving the first. The same principle applies at every stage of expansion: every channel in your mix should have enough budget to clear its minimum effective threshold. If it doesn’t, it shouldn’t be in the mix yet.
The right number of channels isn’t something you decide upfront. It’s something you grow into as the business and the budget can support it.
“The right number of channels isn’t something you decide upfront. It’s something you grow into.”
The Discipline of “Not Yet”
The hardest conversation I have with clients isn’t about which channels to use. It’s about which channels to wait on.
“Not yet” isn’t an admission of failure. It’s a strategic position. It means you’ve looked at what each platform requires to function, understood the realities of your budget, and made the disciplined decision to invest properly in the channels that will actually move your business forward.
The companies that get marketing right don’t spread thin hoping something sticks. They go deep before they go wide. They master one channel, prove the ROI, grow their revenue, and use that growth to fund the next expansion. It’s sequential, not simultaneous. And it works because it respects the fundamental reality that every platform needs a minimum level of investment before it can deliver results.
Your budget is finite. The number of channels available to you is not. The gap between those two facts is where most marketing budgets go to die.
Pick one or two channels. Fund them properly. Optimise them aggressively. And when the data (not your anxiety, not your board, not a conference speaker) tells you it’s time to expand, do it with the same discipline you applied from the start.
That’s how you build marketing that actually works. Not by being everywhere, but by being effective somewhere.
