Marketers have no shortage of tools — marketing project management software, creative workflow systems, collaboration platforms. But the humble project brief still determines more about the quality of creative work than any of them. A well-crafted brief aligns the marketing team, the creative team and every stakeholder before a dollar is spent; a poor one guarantees revisions, delays and compliance risk no tool can rescue.
Despite that, the brief is routinely sidelined — a casualty of time pressure and the assumption that everyone already knows what's needed. This guide covers the nine biggest mistakes marketers make in their briefing process, and how to avoid each one.
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What is a brief?
Simply put, the brief is the document in which the marketer requests work from their agency, designer or creative department.
It must include basic details such as the product or service being promoted, the media channels, formats and specifications, any mandatory elements such as a logo or advertising tagline, and the due date for a response.
But a great brief — even a good brief — goes further. It combines strategy and creativity: it answers why the work is needed, who it's for and what it must achieve. It stays single-minded rather than trying to do too much. And it contains an insight about the way customers behave, act or think that connects with the product or service — the raw material a creative team turns into effective communication. (For the complete structure, see the 13 essential elements of a marketing brief.)
Here are the nine mistakes that most often undermine it.
Mistake #1: Not writing a brief
The most common mistake is also the most fundamental. Overworked marketing teams substitute a quick phone call, a hallway conversation or two lines in an email for a proper brief — and every downstream problem in this list becomes more likely as a result. If the work matters enough to commission, it matters enough to brief. A quick conversation is not a brief; it's the absence of one, with the gaps left for the creative team to fill by guesswork.
Mistake #2: Not spending enough time on the brief
Even when a brief gets written, it often gets the wrong kind of attention: plenty of time on specifications, formats and dates, and almost none on the thinking. Some teams effectively outsource the strategy by expecting the agency to write its own brief from a form of logistics. The details matter — but they're the easy part. The hard part, and the part that determines the quality of the response, is the strategic core covered in the next mistake.
Mistake #3: Not reducing your brief to a single-minded proposition
Whether your organisation calls it the key proposition or the single-minded proposition (SMP), every brief must be reducible to one simple message: the single thing you want people to take away from the finished communication.
The best propositions come from an insight about how your customers behave, act or think. And the test is unforgiving: if the word "and" or "also" appears in your proposition, it isn't single-minded yet — it's several messages wearing one label. Audiences are bombarded with competing messages across every channel; the more focused the proposition, the better its chance of resonating with the people you're trying to reach.
Mistake #4: Not writing the brief for both of its audiences
A brief has two audiences, and marketers routinely write for only one. The first is the end customer — the people the campaign must persuade. The second, often neglected, is the creative team actually reading the brief. Creative teams skim briefs that aren't written for them, hunting for the one thing they need to communicate. Write with that reader in mind and the brief becomes simpler and more useful: shorter, sharper, organised around the proposition rather than around internal process.
Mistake #5: Not respecting the creative team
Being too prescriptive is a quiet way of wasting the talent you're paying for. The brief should describe the problem and leave the solution to the creative team; a marketer who arrives with a preconceived execution and asks the team to build it has removed the reason for having a creative team at all.
There's a practical payoff to restraint: good briefs attract good people. In many agencies, creative teams gravitate toward the briefs they most want to work on — a clear, single-minded, insight-driven brief is motivating, while a 25-page document is not. The better the brief, the better the work it draws.
Mistake #6: Confusing an observation with an insight
This distinction decides whether a brief inspires anything. An observation is a fact about your product or audience — the "what". An insight explains the forces that motivate them — the "why". "45% of the target audience don't buy our product" is an observation. The insight is the discovered, usually non-obvious reason behind it — and it's the insight, not the data point, that gives a creative team something to build from.
Insights are almost always out of sight; they have to be uncovered through research, customer conversations and persistent "why" questions. A brief built on a genuine insight gives the creative team latitude to explore different ideas while staying anchored to a truth about the audience.
Mistake #7: Drowning in your own data
Marketing teams have more data at their fingertips than ever, and the temptation to wrap all of it into the brief is strong. Resist it. Briefs stuffed with charts and background grow longer and longer while lacking the things that actually get the best work from an agency. Data describes what is happening; it rarely explains why someone isn't buying your product — and that invisible "why" is what the brief exists to capture. Include the data that supports the insight; leave the rest in an appendix.
Mistake #8: Not acknowledging when the brief is wrong
Sometimes an agency's responses keep missing — round after round, nothing resonates. It's easy to blame the agency, and sometimes that's fair. But often the honest diagnosis is that the brief itself was wrong: the proposition was off, the insight was an observation, the problem was misdefined. Teams that can sit down, admit it and rewrite the brief consistently get better work back than teams that push the same flawed brief through another round of revisions. The rebrief isn't a failure; it's usually the turning point.
Mistake #9: Mismanaging creative approvals
Poorly managed creative approvals can kill great ideas as reliably as a bad brief. Sometimes it's slow or dishonest feedback on the agency's response. More often it's second-guessing — the marketer rejecting work not on its merits but on a prediction of what their boss will think, which usually just prompts the agency to go around them.
The reliable fix is a regular creative review forum where all approvals are handled and a decision is made then and there: the briefing marketer at the table, interested stakeholders invited, the brief and the response reviewed together, and a clear decision to proceed or change. Agencies trade away backstage lobbying gladly in exchange for a decision — and junior marketers learn the craft by watching briefs succeed and fail in the open.
Get the brief right, and everything downstream improves
A brief built on a genuine insight, reduced to a single-minded proposition and managed through disciplined approvals doesn't just produce more motivating creative work — it reduces revisions, protects compliance and improves the effectiveness of the finished campaign in market. The best briefing cultures go one step further: the marketer writes the brief, then sits down with the creative team to discuss it before work begins. It doesn't happen often. It should.
Simple Admation can help your team brief better and work more efficiently with your stakeholders and your agencies — structured brief templates with mandatory fields, brief approval pathways, and briefs connected to the projects they initiate.
Frequently Asked Questions
What should not be included in a creative brief?
A creative brief should not include unfiltered background data, competing objectives, or solutions disguised as direction. Common inclusions that weaken briefs: research dumps pasted in without an insight drawn from them, multiple primary messages competing for the same campaign, prescriptive creative executions that pre-empt the creative team's work, vague audience descriptions such as broad age ranges with no behavioural detail, and unrealistic combinations of scope, budget and deadline presented as fixed. A brief works when everything in it gives direction; anything that adds length without adding direction belongs in an appendix or a linked document, not the brief itself.
What are the most common mistakes marketers make with creative briefs?
The nine most common creative brief mistakes are: not writing a brief at all and relying on emails or hallway conversations; not spending enough time on it; failing to reduce the brief to a single-minded proposition — one message, with no "and" in it; not writing for both audiences, the end customer and the creative team reading it; being too prescriptive instead of describing the problem and trusting the agency with the solution; confusing observations with insights — the "what" with the "why"; drowning the brief in data; not acknowledging when the brief itself is wrong; and mismanaging creative approvals so that second-guessing kills good ideas.
How do you brief a creative agency properly?
Brief a creative agency by giving them the problem, not the solution: a clear business objective, a precisely defined audience, a genuine insight, one core message, the full deliverable specifications, the budget, the mandatories, and the approval process — then leave the creative response to them. Share the commercial context openly, including what has been tried before and what failed. Confirm the agency has interrogated the brief before work begins; a good agency will challenge weak sections, and that challenge is cheaper at briefing than at first presentation. Finally, agree the review and approval pathway upfront so feedback arrives consolidated rather than in contradictory fragments.
What happens when a creative brief is incomplete?
An incomplete brief transfers its gaps downstream, where they cost more to fix. Missing deliverable specifications surface as assets in the wrong format at review; an undefined objective produces creative work that stakeholders assess against different unstated goals; absent mandatories become compliance failures discovered at final approval; and an unapproved scope becomes a dispute about what was agreed. The revision cycles this creates are the most expensive kind because they involve finished work being redone. This is why structured briefing processes use mandatory fields and brief approval — to catch incompleteness at submission, when correcting it costs minutes.
How does briefing software help avoid creative brief mistakes?
Briefing software prevents the most common brief mistakes structurally rather than relying on discipline. Mandatory fields make it impossible to submit a brief with an undefined objective, missing deliverable specifications or absent compliance requirements. Standardised templates for each project type ensure every brief captures what that kind of work needs. A brief approval pathway ensures stakeholders confirm scope before creative work begins, with sign-off recorded. Admation provides this structure for marketing teams and in-house agencies: centrally managed brief templates with mandatory fields, configurable approval workflows, and briefs connected to the projects they initiate — so brief quality is built into the process.
Want to improve briefing at your organisation? Download the free Guide — Conquer Common Marketing Project Brief Mistakes.
