The Marketing Brief is Still the Most Powerful Document in the Room

“Give me the freedom of a tight brief”, David Ogilvy famously once said. Most marketers who commission creative work have heard it. So why do so few of them act on it? 

The marketing brief is where campaigns are won – or lost. It addresses particular problems. It guides the creative process. And it aligns the client and the creative team, while holding both accountable. 

Get it right, and the end result aligns with your brand and achieves the desired results, with everyone involved giving themselves a pat on the back. 

Get it wrong, and you’re looking at time wasted on revisions, missed deadlines, an outcome that falls flat, plus strained relations between the business, marketing and creative teams. 

Think learning “how to write a marketing brief” is something you ticked off back in your intern days? Think again. 

The 2021 BetterBriefs Global Report – the seminal international study on marketing briefs – found that while 80% of marketers believe they’re skilled at writing briefs, only 10% of agencies agree. Alarmingly, poorly crafted briefs waste up to 33% of marketing budgets globally.

“Don’t go thinking that this is a mistake just made by junior marketers at smaller companies,” Marketing Week columnist Mark Ritson said of the study’s findings. “Many of the mightiest CMOs at the biggest brands are just as guilty.” 

Anyone, at any level, who briefs strategists, writers, designers, art directors or agencies needs to know how to nail this powerful yet neglected tool. Mostly, this means living by the simple rule that “what you put in is what you get out”. Sloppy input gets shoddy results. That was true before AI. And it remains so today. 

The strongest briefs are simple, single-minded and decisive. They’re clear on the problem – and the solution. Which, given the amount of bad briefs out there, is clearly easier said than done. 

This decisiveness is especially important in the AI era, with its shiny new ‘toys’ and automation seeing machines doing more of the doing. “We’re swimming in tools, trends, prompts and opinions. The ability to decide what matters is more valuable than the ability to absorb it all,” said Fractional CMO Fabrizia Roberto, in an article on how marketers stay relevant in the age of AI. 

You don’t need a new tool for this essential skill. You need to have reached one ruthless decision before you hit ‘send brief’. 

In this blog, we cover why most marketing campaigns fail because of the brief; how to write a marketing brief that actually gets results; and what a good creative brief includes in 2026. And note that by “the brief” we mean the document behind any marketing work or creative solution, whether you call it the client brief, the marketing brief, the content brief or the creative brief.

5 Common brief mistakes

1. There’s no single angle (POV) or proof point

In the same Marketing Week article cited above, Ritson spoke of how the brief and strategy are linked “like high cholesterol and heart disease”. Yet marketers often miss this, the heart of the matter: the strategy. As the Better Briefs study found:

• 78% (most) marketers believe their briefs provide clear strategic direction
• Only 5% of agencies agree
• 60% of marketers admit to using the creative process to clarify the strategy

This often results from briefing that happens too early, before stakeholders have done the work required to get clear on the direction. Without a clear problem, solution and proof point, the brief is treated as just a starting point. It changes as the creative process unfolds, with re-briefs and shifting goalposts wasting everyone’s time and causing animosity among the team. 

2. It reads like a mash-up of copied-and-pasted fields and voices

Too many cooks spoil the broth, as they say. In this case, too many contributors to the briefing document make for mediocre work. This often stems from approval processes that see senior stakeholders wanting to put their mark on the near-finished brief. The problem? The document ends up being unclear and uninspiring. 

The biggest mistake you can make is treating your creative brief template like a form to fill out. An overreliance on templates can lead to a laundry list of filled-out category fields, rather than choices, on a brief that is trying to do too much. 

For example, if you fill out: “Target audience: Marketing managers”, that’s a category. But if you write: “A mid-level marketing manager juggling three live campaigns, who needs this brief to save her a week of back-and-forth”, you’ve made a decision. This saves the person doing the work from having to make the choices for you. 

3. It’s vague in tone and on essentials

The main missing ingredient in briefs, according to 55% of respondents from agencies in the Better Briefs report, is “clear objectives and outcomes”. Often, meaningless filler words like “raise awareness” are used instead of specific outcomes that will impact the company’s bottom line. Sometimes, even the following core elements are missing:

• The client’s competitors 
• Internal link targets – and for anyone writing for AI Overviews, an understanding of how content sits within a topic cluster, as well as how GEO operates at the sentence level.
• Clear CTAs

The brief can also read like a word salad of jargon, acronyms and buzzwords that the reader is left to decode and decipher. 

4. It doesn’t include any success metrics

If you want your campaign to be successful, you need to be able to measure its success. More than something to put on your marketing report, metrics provide objective evaluation standards that drive focus.

When everyone knows the goal they’re collaborating towards, the boundaries set remove the guesswork and keep everyone on track. 

5. It’s too long and too prescriptive

While being vague is one mistake, veering too much in the other direction is equally misguided. Briefs that are too lengthy, over-engineered and dictatorial will make the creative reading it feel their hands are tied before even beginning.

 As Ryan Law, Director of Content Marketing at Ahrefs, has said: 

“Briefs should also be brief – they are not content outlines. Spend too long writing suggested headers, recommending examples to include, and handpicking competitor articles to read, and you may as well have written the article yourself.”

What a good brief contains

Clear objectives: Specific, measurable business goals for your product or service, and KPIs you aim to achieve. 

Not just “increase brand awareness”, which is a category. A decision is more like: “We need 200 qualified trial sign-ups from mid-market SaaS teams by end of Q3, and this piece is one of three assets carrying that number”. 

Target audience details: A description of the audience demographic and segment, and what stage they’re on in the customer journey. 

Not, “marketing managers between 35-50.” Instead, “A marketing manager who has been burned by agencies getting the brief so wrong, she’s sceptical about outsourcing design work and is reading this with a scowl”. 

Channel plan and deliverables: The specifications, formats and platforms where the content will be published. 

Instead of “a blog post, social assets,” write: “One 1,500-word article created for GEO, plus two LinkedIn posts written to be screenshots”. 

Budget and timeline: Cost details, key milestones and deadlines for deliverables. 

Not “TBC / end of the month”. Be decisive with: “First draft by the 14th, with no extensions”. 

Assessment details: An outline of which stakeholders will assess the work and at which stage. Be specific by naming the main person responsible for sign-off.

The 3 key elements (what most briefs are missing)

1. The single angle: Do the heavy-lifting before writing the brief, so you can come up with a clear point of view articulated as a decisive line that everyone agrees on and which guides all of the work. The brief must include the single most important line: “This piece must answer [specific question] better than anyone else on the internet”. 

A weak angle is: “We want to position ourselves as thought leaders in B2B SaaS marketing”.

A sharper angle is: “This piece must answer ‘Why do most B2B campaigns fail to convert?’ better than anyone else who’s written about it — with one proof point they haven’t used”.

2. The proof point: The statistic, data, case study or example that backs up your angle by adding credibility. 

3. The internal link target: Clarity as to where this creative work sits within the broader content ecosystem. This is especially important for GEO, which prioritises content topic clusters, and penalises any cannibalising of your own content. 

Why the brief matters now, more than ever

The brief was always the difference between good and mediocre work. That hasn’t changed. With AI tools making some marketing tasks lighter, some may assume that briefing matters less in the age of the prompt. The opposite is true. 

Before AI, weak briefs were rough starting points that created friction. Unclear instructions might’ve led the writer or designer to go back to the marketer with questions. This friction, though annoying, was an effective form of quality control. 

AI doesn’t give any pushback. It produces polished work on whatever you gave it, no questions asked. So a crucial error-correction step is lost. The final product may look “perfect”, yet still be all wrong. And as we’re all realising, it’s much harder to fix a finished product than it is to tweak a rough WIP. 

To avoid fast-made, generic slop, your brief is your best bet. To make it a winning one, include a specific angle, one proof point that backs it up, and a clear answer worth reading. Treat the brief like a decision, not a form. So go ahead and make one before you sign off and hit ‘send’.