The big idea in marketing: what it is made of, and the four tests it has to pass

A big idea in marketing is one organising thought that can carry a brand across every channel and keep working for years. It is not a strapline, a campaign or a logo. It is the thought underneath all of them, and the practical test is simple: a big idea can be explained in a sentence, drawn on a napkin, executed in at least five different formats including ones you have not thought of yet, and handed to a new agency in three years' time without a rewrite. Most things presented as big ideas fail one of those four tests, usually the third, because they are really one excellent film with a line attached. This page sets out what a big idea contains, how to find one, and how to judge one somebody is selling you.

What a big idea is made of

Three components, and an idea missing any one of them tends to collapse in the second month.

• A human truth. Something true about the buyer's life that they would recognise instantly, usually a tension: they want two things that pull against each other. People want to eat well and they have twenty minutes. People want to look established and they are two months old as a business.
• A brand truth. Something genuinely true about you that resolves that tension. Not an aspiration. A mechanism, a design decision, a service choice, a way you are built that competitors are not.
• A dramatisation. The way the first two are expressed so that somebody feels it rather than being informed of it. This is the part people call the idea. It is the third part.

Put as a sentence: because [human truth], and because [brand truth], we will [dramatisation] everywhere we appear. If that sentence does not hold together, no amount of execution will rescue it.

Big idea, positioning, campaign, strapline

Thing	What it is	How long it lives	Who writes it
Positioning	The place you hold against the alternatives	Years. Changes on evidence	The business
Big idea	The organising thought that expresses the positioning	Three years or more	Creative, from a business brief
Campaign	One burst of activity under the big idea	Weeks to months	Creative and media
Strapline	A line that captions the idea	Varies. Often outlives the idea	Copy
Execution	The specific film, page, poster or post	Days to weeks	Production

The reason this ordering matters is budget. A business with one strong positioning and one big idea can run small activity for years and accumulate recognition. A business that changes the idea every campaign pays the cost of starting again each time, and recognition never compounds.

How to find one

1. Write the business problem as one sentence, with a number in it where you have one. "People who need us only think of us once they are already in trouble" is a problem. "Increase brand awareness" is a budget line.
2. Collect the raw material. Sales call recordings, support tickets, review sites, the questions buyers actually ask, and the objections your own team hears weekly. The human truth is in there, in the buyer's own words.
3. Name the tension. Two things the buyer wants that pull against each other. An idea without a tension has nothing to resolve and nowhere to go.
4. Find the brand truth that resolves it. Walk the business, not the brand guidelines. The resolving truth is usually operational and usually something the business thinks is boring.
5. Write ten one line expressions, then throw away the ones that only work as a film.
6. Stress test the survivors against the five format test below, and pick the one that survives in the cheapest format as well as the most expensive.

The four tests

The napkin test. Can somebody who heard it once draw it and explain it to a colleague? If it needs a deck, it is not an idea yet, it is a rationale.

The five format test. Write the idea as a thirty second film, a single poster, a shop window, an email subject line, and one thing a member of staff says on the phone. An idea that works in all five is durable. An idea that only works in the film is a film.

The three year test. Will it still be true after the product range changes? Ideas anchored to a feature expire with the feature. Ideas anchored to a tension survive it.

The competitor test. Could your two strongest competitors run this idea tomorrow? If yes, it is a category observation rather than your idea, and you would be paying to advertise the category.

The brief that produces one

Agencies are rarely the reason an idea comes back weak. The brief usually is. Keep it to one page with seven lines: the business problem, the audience described by behaviour, the single thing we want them to think or do differently, what we can honestly claim and the proof for it, the constraints that are real, the channels it must survive in, and what success looks like in numbers. Then add the most useful line of all, which is what you will not change: the name, the price architecture, the product, whatever is fixed.

How to judge ideas presented to you

• Ask for the human truth and the brand truth as separate sentences, before the creative work is shown. If they cannot be stated, the work is decoration.
• Ask to see the cheapest execution, not the most expensive. The poster and the phone script, not the film.
• Ask what the idea stops you doing. Ideas with no edges are not ideas.
• Ask how it looks in year two, with different products and a smaller budget.
• Resist choosing the idea you personally like most. Choose the one that answers the problem in the brief.
• Agree how it will be measured before you approve it, against a baseline taken now.

This page covers the big idea and how to find and judge one. For the decision the idea has to express, see segmentation, targeting and positioning. For the decisions that come before any creative work, see strategic marketing. For measuring the recognition it builds, see how to increase brand awareness. For where it sits in a working document, see the marketing plan template.

Questions buyers ask about big idea in marketing

What is an example of a big idea in marketing?

Rather than borrow somebody else's, build the shape: for a plumbing firm whose buyers only call in a crisis, the human truth is that nobody chooses a plumber calmly, the brand truth might be a published arrival time, and the dramatisation is everything the brand does being about certainty rather than craft. That shape is the thing to copy, not another brand's execution.

Is a big idea the same as a tagline?

No. The tagline is a caption. The idea is the thought that makes the caption mean something, and a strong idea usually outlives several taglines.

Who should come up with the big idea?

Creative people working from a business brief written by somebody who owns the problem. Ideas written entirely inside the business tend to lack tension. Ideas written entirely outside it tend to lack a brand truth.

How long should a big idea last?

Plan for at least three years and judge it annually. Recognition compounds through repetition, so changing a working idea is one of the most expensive decisions in marketing.

Does a small business need one?

Yes, and it matters more, because a small budget cannot afford to restart. One consistent thought said the same way for three years is what makes a small spend add up.

How do I measure a big idea?

Take a baseline now on prompted and unprompted recognition in your audience, plus branded search volume and direct enquiries. Read those quarterly against the baseline rather than monthly against each other.

The idea as an assistant retells it

A big idea has to survive being told by someone else. Now one of the tellers is an assistant: a buyer asks which supplier suits their situation, and the reply describes each business in a sentence built from reviews, roundups and comparison pages. Read that sentence for your name. If your idea is in it, in close to your own words, it has travelled. If the sentence describes you generically, or gives your idea to a rival, run the four tests in this guide again on the version that exists outside your campaign. AI Knows Us measures how assistants name and describe a business when buyers ask.