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The CSD Matrix is an essential tool for those who need to structure marketing strategies in uncertain scenarios. After all, planning a marketing strategy in an increasingly uncertain scenario is like putting together a jigsaw puzzle with jumbled pieces, some missing and others duplicated. Especially since new tools, changes in consumer behavior, more agile competitors, and executives eager for immediate results are constantly emerging. In this context, how do we separate what we know from what we merely assume? How do we maintain sanity without getting lost in opinions, assumptions, and pressure to deliver?
That's exactly where the CSD Matrix comes in—a simple yet powerful tool for bringing clarity, focus, and structure to your marketing planning. In this article, we'll explore everything you need to know about it, with practical examples, real-world applications, and strategic guidance.
What is the CSD Matrix?
The CSD Matrix is a planning tool used to organize information into three distinct categories: Certainties, Assumptions, and Doubts. Created within the scope of innovation and design thinking, it was quickly adopted by marketing teams for its usefulness in contexts where there is not enough information to make reliable decisions.
“The CSD Matrix serves to separate what you know, what you think you know, and what you don't yet know.”
Originally promoted by user-centered design methodologies such as Design Thinking, the CSD Matrix emerged to facilitate discussions in collaborative environments. Its purpose is clear: to help teams deal with ambiguity and eliminate noise, focusing on what truly matters.
The CSD Matrix has become essential in marketing because it's an area that often operates with incomplete data and a high degree of subjective interpretation. Therefore, if you work in a mid-sized company, you've probably asked yourself: "Are we really targeting the right audience?" leads are qualified or just curious visitors?", "Will this funding bring a return?" The CSD Matrix helps organize these reflections into a structure that facilitates decision-making.
How the CSD Matrix Works
The CSD Matrix is divided into three main columns:
Understanding Certainties
These are the facts. This is the information the team knows with confidence. So, it might be something like: "Our website receives 20,000 monthly hits" or "Our average ticket is R$ 350." In other words, everything that's proven with data and isn't subject to dispute goes in this column.
Identifying the Assumptions
Assumptions are what we believe to be true but haven't yet confirmed. For example: "We believe that audience X has higher conversion rates" or "We assume that the new campaign will improve our ROI." These hypotheses should be tested as soon as possible, as they are common marketing pitfalls.
Raising Doubts
Doubts are questions we haven't yet answered. They're knowledge gaps. Examples: "What is the average buying cycle of our leads?" or "Why has the email open rate dropped?" This is where research and active data mining come in.
Benefits of the CSD Matrix for Mid-Sized Companies
Lean companies need to be surgical in their strategies. Thus, the CSD Matrix brings focus. Above all, it prevents the team from wasting energy trying to solve nonexistent problems or, worse, investing in solutions based on guesswork.
With this matrix, you can:
- Prioritize testing and validation;
- Increase clarity in planning;
- Avoid conflicts based on personal opinions;
- Make faster, more informed decisions.
How to apply the CSD Matrix in marketing planning
Step 1: Defining the context and objectives
Before creating the matrix, define the context of the action. Are you launching a new product? Creating a campaign? paid media? Redesigning the marketing funnel? Defining the objective helps focus what will be analyzed.
Step 2: Collaborative construction of the matrix
The CSD Matrix shouldn't be created alone. Therefore, bring together everyone involved in the project—marketing, sales, product, and even customer service teams. Using post-it notes or tools like Miro and FigJam, fill in the three columns based on each person's perceptions.
Step 3: Validation and prioritization
Now comes the analytical part. What assumptions need to be validated? Which questions are most critical to the project's success? In this sense, prioritize and outline investigation plans, A/B testing, user research, etc. benchmarking, between others.
Step 4: Transforming the matrix into an action plan
Finally, translate the matrix inputs into a concrete action plan. First of all, certainties become the basis for decisions. Assumptions become tests. And finally, doubts become research briefings. Thus, each column should generate tasks with deadlines, metrics, and assignees.
“In marketing, the CSD Matrix prevents wasted time and money by indicating where there are knowledge gaps that need to be investigated.”
Practical examples of the CSD Matrix applied to digital marketing
Imagine your company is going to launch an eBook for lead generation:
- Certainties: “Instagram audiences are more engaged”, “Our blog generates 500 visits/day”.
- Assumptions: “The eBook topic will interest the target audience”, “The CTA on the page will convert above 20%”.
- Doubts: “What is the best channel for distributing the eBook?”, “What is the main obstacle to download: design or copy?”
Using this matrix, you'll know where to act first and how to quickly test your hypotheses.
“If you have more questions than answers in a project, start with the CSD Matrix.”
Mistakes that compromise the use of the matrix
One mistake is treating assumptions as certainties. This happens when a personal opinion or outdated data is taken as absolute truth. On the other hand, a common mistake is failing to update the matrix throughout the project. After all, it's not a static document, but rather a dynamic and interactive one. And finally, it's easy to fall into the trap of using the matrix as a checklist rather than a reflection tool.
When to use the CSD Matrix: ideal times
The CSD Matrix is especially useful in:
- Project kick-off meetings;
- Start of marketing campaigns;
- Funnel restructuring;
- Creation of personas and customer journey;
- Evaluation of tools and suppliers.
Whenever you have a lot of ideas but little clarity, it's a good time to pull out the matrix.
Conclusion
The CSD Matrix is one of the simplest and most effective tools for transforming chaos into clarity. It puts everyone on the same page, reduces noise, and accelerates decision-making based on what truly matters.
If you want to professionalize your marketing planning, generate more qualified leads, and position yourself as an authority in your market, start using the CSD Matrix. It's a small step for the team, but a leap for your strategy.
FAQ – Questions and Answers about the CSD Matrix
1. What does the acronym CSD mean?
CSD stands for Certainties, Assumptions, and Doubts. It's a framework for classifying ideas and information during planning.
2. How to apply the CSD Matrix in digital marketing?
Use it to validate campaign hypotheses, better understand customer behavior, and guide testing and research.
3. When should I use the CSD Matrix?
It is ideal at the beginning of projects, campaigns or when redesigning processes, when there are still many uncertainties involved.
4. What is the difference between an assumption and a doubt?
An assumption is something we believe to be true, but without confirmation. Doubt is an open question, something we don't know.
5. Is the CSD Matrix only for marketing purposes?
No. It can be applied to any area where decision-making is required under uncertainty, such as product management, sales, and design.
Start using the CSD Matrix in your marketing planning right now. And if you need help, call a Vero Contents expert!
Image: Freepik

Marcel Castilho is a specialist in digital marketing, neuromarketing, neuroscience, mindfulness and positive psychology. In addition to being an advertiser, he also has a Master's degree in Neurolinguistic Programming. He is the founder, owner and CEO of Vero Contentes and the offline agency VeroCom.
