Big idea: the central idea holding a whole campaign, and why almost nobody has one

A big idea is the concept giving everything unity. Every piece in a campaign, from the ad to the email to the caption, is a different expression of the same idea.

It is commonly confused with three close neighbours:

• It is not the headline. The headline expresses the big idea in one specific sentence, and you can have ten different headlines for a single big idea.
• It is not the slogan. A slogan is a permanent brand signature; a big idea is one campaign's argument, and it changes.
• It is not the product benefit. "Saves time" is a benefit. The big idea is the angle turning that benefit into something the person never thought of that way.

An idea is only big if it survives four questions:

• Is it one? If you need an "and" to explain it, you have two medium ideas.
• Is it new to people who have seen everything? It does not have to be new to the world, it has to be new to that audience in that context.
• Does it fit in a sentence? If not, it will not be repeated, and an idea that is not repeated does not spread.
• Does it survive a hundred pieces? This is the test that fails almost everything. If the idea runs out in three posts, it was a good hook, not a big idea.

A big idea does not come from a brainstorm meeting, it comes from tension. Some places it usually hides:

• A common belief that is wrong. Contradicting what everyone accepts is the most reliable source of a big idea, because it creates instant tension.
• A named enemy. Not a competitor, but the practice, habit or system causing your audience's problem.
• A reclassification. Saying the thing is not what everyone thinks it is. "This is not X, it is Y" is the structure of half the great campaigns.
• A question nobody is asking that, once asked, cannot be ignored.

In every case, the raw material comes from research: the customer's literal language, what they already complain about, what they already believe.

Two reasons, and both are organisational more than creative.

The first is fear of choosing. A big idea excludes: by saying one thing, you stop saying all the others. Anyone afraid of leaving an argument on the table ends up with a list of five messages, which is not a campaign, it is a catalogue.

The second is haste. A big idea requires research and several discarded attempts. Weekly content production creates pressure to publish something today, and the result is a succession of pieces with no common concept.

Worth an honest counterpoint: not every job needs a big idea. Routine content, tutorials and answers to questions work fine without one. It matters when there is something large to communicate and a real contest for attention.

• I can state the idea in one sentence, with no "and".
• It contradicts something my audience believes today.
• It sustains many pieces, not three.
• Every piece in the campaign expresses the same idea.
• It came from research, not from a meeting.