The short version
A vague brief does not save you time, it moves the cost. Someone still has to fill the gaps, on your budget, without knowing your business the way you do.
Six questions cover it. Objective, audience, offer, timeline, budget and success metrics, answered properly, beats a long document that answers none of them.
The best briefs read like a conversation. They admit what is uncertain and trust the agency to ask the rest.
A vague brief does not save you time, it just moves the cost
Most agency relationships that go wrong do not go wrong in the delivery. They go wrong in the two lines of the email that started it: “need social content for next month, keep it fresh.” Everything that follows, the wrong tone, the missed deadline, the three rounds of revisions, traces back to a brief that never said what it needed to. Learning how to brief a marketing agency properly is one of the highest-leverage things a business owner or marketing manager can do before a project starts, and it costs nothing but twenty minutes.
A one-line brief feels efficient. It is not. The work of figuring out what you actually meant does not disappear, it moves downstream and gets more expensive as it goes. Someone on the agency side fills the gaps with a guess. If the guess is wrong, you find out after the deck is built, the ad is live, or the content calendar is full of the wrong tone of voice. Now you are paying twice: once for the work, once for the redo, and the timeline has slipped regardless of whose fault it was.
What actually belongs in a marketing brief
A good brief is not a long document. It is a short one that answers six questions properly instead of a long one that answers none of them.
OBJECTIVE: WHAT HAS TO BE TRUE AFTERWARDS
“More awareness” is not an objective, it is a mood. What changes because this work exists? More qualified enquiries, more repeat purchases, a shorter sales cycle, a specific product moving off the shelf. Name the business outcome, not the deliverable. The deliverable is the agency's problem to solve.
AUDIENCE: WHO YOU'RE ACTUALLY TALKING TO
Not “everyone who might buy this.” The person you are writing for right now, for this piece of work. What do they already believe, what are they deciding between, what would change their mind. An agency that knows the audience can make ten small good decisions without checking in. One that does not will ask you to approve all ten, or worse, will not ask and guess wrong.
OFFER: WHAT YOU'RE ASKING THEM TO DO NEXT
Every piece of marketing is pointing at some next step, even if nobody wrote it down. Book a call, request a quote, sign up, reply to an email. If you have not decided what that step is, the agency will invent one, and it may not be the one that actually moves your business forward.
TIMELINE: REAL DATES, NOT “SOON”
“ASAP” tells an agency nothing except that you are anxious. A real date, plus the date you actually need it live by (they are often different), lets someone plan the work properly instead of firefighting it. If there is a hard external deadline, a launch, an event, a seasonal window, say so. That is often the single most important line in the brief.
BUDGET: GIVE A NUMBER, EVEN AN APPROXIMATE ONE
Withholding the budget does not get you a better price, it gets you a proposal built for a number nobody can see, which is usually wrong in one direction or the other. A range is enough. It lets an agency recommend the right scope instead of guessing at what you are willing to spend and hedging the recommendation to match.
SUCCESS METRICS: HOW YOU'LL KNOW IT WORKED
Decide before the work starts, not after, what “it worked” will look like. Leads, revenue, rankings, engagement, whichever is genuinely tied to your objective. Agreeing this upfront also does something more useful than measuring success: it stops the goalposts moving later, for either side.
What a good brief buys you
The best briefs we receive do not read like a spec sheet. They read like the start of a conversation. They tell us the problem honestly, including the parts that make the business look less than perfect, and they trust us to ask the questions that fill in the rest.
We would rather ask five questions up front than deliver the wrong thing beautifully.
That is the relationship we would rather have. We are not a vendor waiting for instructions, we are a strategic partner, and a partner needs to understand the actual problem, not just receive a list of tasks. A brief that says “we think it's X but we're not certain” is more useful to us than one that confidently specifies the wrong deliverable.
On one retail account we brought on this year, the whole content programme sat in four pages before a single post was drafted: who decides the topics, who writes the brief, who signs off, how the pace scales once it is working. Nobody had to guess whose job it was to brief the copywriter or approve the calendar. That is what a working brief actually buys you, not paperwork, a decision made once instead of five times.
This is also, frankly, where a lot of South African businesses lose value in agency relationships. Budgets are tighter and timelines shorter here than the case studies from bigger markets suggest, so there is less room to absorb a misfire. A brief that is clear the first time is not a nicety, it is how you protect a budget that does not have slack built into it.
Run through this before it goes out
If you can answer all six in under a page, you have written a better brief than most businesses ever send.
Marketing brief template
Have I named the business outcome, not just the deliverable?
Do I know who this specific piece of work is talking to?
Is it clear what I want the reader or viewer to do next?
Have I given a real date, including any hard external deadline?
Have I given a budget figure or range, even approximate?
Have I said how we will both know it worked?
Questions we get asked about briefs
How long should a marketing brief actually be?
Short. A brief that answers six questions properly, in under a page, beats a long document that answers none of them properly. Length is not the signal of a good brief, clarity is.
What if I do not know the exact budget yet?
Give a range instead. Withholding the number entirely does not get you a better price, it gets you a proposal built for a figure nobody can see, and that is usually wrong in one direction or the other.
What is the difference between an objective and a deliverable?
The objective is the business outcome: more qualified enquiries, a shorter sales cycle, a product moving off the shelf. The deliverable, the landing page, the ad set, the content calendar, is how the agency gets you there. Give us the outcome and let us solve the deliverable.
Do I need to decide the offer or next step myself?
Yes, or at least point us at it. Every piece of marketing points at some next step, whether anyone wrote it down or not. If you have not decided it, the agency will invent one, and it may not be the one that actually moves your business forward.
How do we agree on whether the work succeeded?
Decide before the work starts, not after, what “it worked” will look like: leads, revenue, rankings or engagement, whichever is genuinely tied to your objective. Agreeing this upfront stops the goalposts moving later, for either side.