1. Start with the problem, not the service
This is probably the most important point.
When a company sees its sales or lead generation declining, the natural reaction is to look for a solution:
- “We need SEO.”
- “We need a new website.”
- “We need to invest more in advertising.”
- “Our brand needs a refresh.”
- “We need a stronger LinkedIn strategy.”
But the lever you identify is not necessarily the cause of the problem.
Poor acquisition may be caused by your campaigns.
But it may also be caused by your positioning, value proposition, target audience, website or sales process.
A low conversion rate may be a UX problem.
But it may also be caused by an unclear promise or by attracting the wrong audience.
A decline in visibility may be an SEO issue.
But it may also reveal a content problem, a lack of perceived expertise or changes in how people search.
Before choosing a service, understand the problem.
2. Be aware of the natural bias of specialised agencies
This is something companies rarely consider when comparing agencies.
A specialised agency can be exceptionally good at what it does.
But its area of expertise naturally influences how it diagnoses a problem.
Go to a branding agency because your business is struggling to grow.
They will probably start by analysing your brand.
Go to an acquisition agency.
They will naturally look at your campaigns, audiences, channels and acquisition costs.
Go to an SEO agency.
They will start with your organic visibility, content and technical architecture.
This is perfectly logical.
Expertise creates a point of view.
The issue arises when you ask a specialised agency to determine which expertise you actually need.
Without meaning to, it may look for the answer within the area it knows best — and sells.
3. Don't fix the shoulder if the problem is actually in the neck
Here is a simple analogy.
Your shoulder hurts.
You see a shoulder specialist.
They identify a problem and treat it.
But the real cause of the pain is actually cervical.
You may have perfectly treated your shoulder.
But you have not treated the cause.
Marketing works in much the same way.
A company may believe it needs more acquisition.
So it increases its advertising budget.
But its positioning remains undifferentiated.
Traffic increases, without a proportional increase in customers.
Or it decides to redesign its website to improve conversion.
But the real problem is its value proposition.
Or it invests in SEO while its content fails to demonstrate enough expertise.
Or it modernises its brand without considering the elements that created trust among existing customers.
The problem is not necessarily the treatment. Sometimes it is the diagnosis.
4. Look for neutrality in the advice you receive
This is why, when the problem is not yet clearly defined, we believe it is useful to start with an approach that is broad enough to avoid locking the diagnosis into one discipline.
The agency should be able to ask:
Is this really a branding problem?
Is it really an acquisition problem?
Is it really a conversion problem?
Is it really a visibility problem?
Is it really a CRM problem?
Or is it a combination of several factors?
At Belly & Brain, we call this an agnostic approach.
We don't start with a service to sell.
We start with the problem to solve.
That may lead to a branding recommendation.
Or SEO.
Or an acquisition campaign.
Or a UX redesign.
Or simply a recommendation to do none of those things immediately and start by clarifying the positioning.
The recommendation should follow the diagnosis — not the other way around.
5. Make sure the agency understands how disciplines interact
Marketing does not work in silos.
Your brand influences acquisition.
Your acquisition influences conversion.
Your value proposition influences your advertising.
Your UX influences conversion.
Your content influences visibility and credibility.
Your CRM influences your ability to convert and retain customers.
Your strategy gives direction to the whole system.
This means that an excellent decision in one area can sometimes create a problem somewhere else.
A few examples
You increase your acquisition budget.
→ More traffic, but a value proposition that is still too weak to convert.
You redesign your brand.
→ A more modern identity, but the loss of trust signals that mattered to your customers.
You rebuild your website.
→ A better user experience, but an architecture that damages organic visibility.
You optimise your campaigns.
→ A lower cost per lead, but lower-quality prospects.
You automate your CRM.
→ Greater operational efficiency, but a customer experience that becomes impersonal.
Optimising one part of the system does not necessarily mean optimising the system.
That is why an agency's ability to understand different disciplines together matters.
6. Specialist or broad-spectrum agency: which should you choose?
This does not mean specialised agencies are a bad choice.
Quite the opposite.
When you know exactly what you need, a specialist may be the best possible partner.
You already have a clear strategy and simply want to improve your organic visibility?
→ An SEO specialist may be ideal.
Your positioning is established and you need a new visual identity?
→ A branding agency may be exactly what you need.
Your strategy is clear and you only want to optimise your paid campaigns?
→ An acquisition agency may be the right partner.
So the question is not:
“Is a specialised agency better than a broad-spectrum agency?”
The more useful question is:
“Have I already identified the problem I need to solve?”
If yes, choose the expertise you need.
If not, start with a broader diagnosis.
7. Ask who will actually work on your project
An agency's portfolio does not necessarily tell you who will work on your account.
Before signing, ask:
- Who will be my main contact?
- Who defines the strategy?
- Who actually produces the deliverables?
- How experienced are the people involved?
- Which capabilities are handled internally?
- Which are outsourced to partners?
- Who oversees overall consistency?
- Will the senior people involved in the pitch actually work on the project?
This is particularly important for strategic assignments.
A sales presentation can be excellent.
But if the people who developed the recommendation disappear once the project starts, your experience may be very different.
Choose the team that will actually work with you, not just the agency you met during the pitch.
8. Define the scope before comparing prices
“How much does a marketing agency cost?”
It is a legitimate question.
But it has very little meaning without a clearly defined scope.
One agency may quote €3,000 per month.
Another €6,000.
That does not necessarily mean the first one is twice as cheap.
Their scopes may simply be radically different.
Before comparing prices, clarify:
- objectives;
- deliverables;
- responsibilities on both sides;
- channels covered;
- production volume;
- number of meetings;
- reporting;
- timelines;
- limitations;
- additional services;
- tools or licences;
- collaboration terms.
Before comparing prices, compare what you are actually buying.
Ask:
“For this investment, exactly what is the agency taking responsibility for?”
A well-defined scope protects both sides.
9. Be careful with proposals that cannot genuinely be compared
Two proposals may use completely different pricing models.
One may charge per project.
Another per month.
A third per day.
None of these models is inherently better.
What matters is understanding the value and responsibilities associated with the price.
A low day rate can become expensive if the project requires extensive coordination.
A higher fixed fee may be entirely reasonable if it includes more senior expertise, strategic thinking and execution.
The important questions are:
What will we get?
Who will do it?
What will it cost?
10. Check whether the agency is willing to say no
This is a very useful test.
Ask:
“What do you do if you believe our initial request is not the right priority?”
An agency that simply says:
“We execute what the client asks us to do.”
is essentially a service provider.
An agency that says:
“We will explain why we believe another priority would be more relevant.”
is operating more like a strategic partner.
A true marketing partner should be willing to challenge:
- your brief;
- your assumptions;
- your priorities;
- your investments;
- your channels;
- your timing.
Sometimes the best recommendation is not to do what you originally planned.
11. Ask for results — but also ask for context
Big logos are reassuring.
Big numbers are impressive.
Neither is enough.
If an agency tells you:
“We generated 40% more leads.”
Ask:
- Over what period?
- From what starting point?
- With what budget?
- What exactly counts as a lead?
- How much of the result can reasonably be attributed to the agency?
- What else changed during the same period?
A good case study does not simply show a result.
It explains:
the problem → the diagnosis → the intervention → the timeframe → the outcome.
That is what allows you to properly evaluate an agency's work.
12. Check the agency's actual capacity
An agency can list numerous capabilities without necessarily having the capacity to deploy all of them effectively.
So ask:
- How large is the actual team?
- Which capabilities are genuinely in-house?
- Which rely on external partners?
- How are different disciplines coordinated?
- How many clients does each team handle?
- Who ensures continuity?
- What happens if your project grows?
This becomes particularly important when you are looking for a partner across several areas of marketing.
Where does Belly & Brain fit?
At Belly & Brain, we deliberately built a broad-spectrum approach to avoid reducing a marketing problem to a single discipline.
We can work across:
Strategy & positioning
Understanding your market, audiences, value proposition and priorities.
Brand & experience
Evolving your brand, identity and customer experience.
Acquisition & performance
Identifying and optimising the acquisition levers that actually make sense.
Digital & UX
Turning strategy into coherent, effective digital experiences.
SEO, GEO & AI visibility
Building visibility across search engines and emerging generative search environments.
CRM & marketing automation
Structuring data, journeys and mechanisms that improve conversion and retention.
But most importantly:
we do not believe every project needs all of these disciplines.
We identify what is actually needed for your situation.
That is the difference between offering a catalogue of services and building a response around a real business problem.
So, how should you choose your marketing agency?
Before signing, ask yourself:
Has the problem actually been diagnosed?
Or have you simply requested a service you believe you need?
Can the agency look beyond its primary expertise?
Can it recognise that an acquisition problem may actually come from positioning, branding or conversion?
Are the people working on your project experienced enough?
And will they actually be involved?
Is the scope sufficiently clear?
Do you know exactly what is included and what is not?
Can you genuinely compare the price?
Are you comparing equivalent scopes?
Is the agency willing to challenge you?
Can it tell you when another priority matters more?
Are the results properly documented?
Do you understand what was actually done and in what context?
And most importantly: is the agency trying to sell you its expertise, or solve your problem?
That may be the most important question of all.
In conclusion
There is no single marketing agency that is right for every company.
A specialist agency may be the best choice when your problem is clearly identified.
But when all you know is that “something isn't working”, start with the diagnosis.
Because in marketing, as elsewhere:
the right treatment applied to the wrong problem is still the wrong treatment.
Finding an agency capable of looking at the broader system can help you avoid an initial bias and choose the right expertise at the right time.
At Belly & Brain, that is precisely our role:
understand the problem before choosing the lever, remain agnostic in our recommendations, and then help execute the right solution.
Because ultimately, a good marketing agency should not simply ask:
“What would you like us to do?”
It should also ask:
“Why do you think that is what needs to be done?”
