Before You Prompt: Define Your Brand Voice, Set Your Content Pillars 

How a strong brand voice and well-defined pillars keep your AI-assisted content from sounding like everyone else’s.

 

In a world flooded with AI-generated content, being unmistakably human is your greatest advantage. The hard part is actually pulling that off without ignoring AI or leaning on it too hard. That’s what this series is about: exploring real ways to use AI to define your brand voice instead of flattening it. We’ll walk through strategy, video and podcasts, blog posts and case studies, and social and email — one post at a time. 

Tell me if this sounds familiar. Someone pitches an idea in a meeting that sounds incredible — polished, exciting, everyone in the room is nodding. Then one basic question gets asked, and the whole thing just falls apart. That’s not bad luck. That’s what happens when there’s no foundation underneath an otherwise stellar idea. 

Part 1 of this series by Alexis Gajewski inspected the first two layers of foundation. That includes figuring out who you’re actually talking to — not the job title, the actual person having an actual bad day — and looking hard at what your competitors are already saying, so you’re not reiterating the same talking points as every other marketer in your industry. 

That’s two questions answered. Two more to go, and this is where things get a little less comfortable. Those first two were about looking outward, at your audience and at everyone else in your space. This half turns the lens around. What do we actually sound like? And what are we actually about? 

Most brands never sit down and answer either one. It just happens by accident — a voice that drifts depending on who’s writing that week, a content calendar built from whatever felt urgent on a Tuesday. Left alone, AI won’t fix that for you. It’ll hand you something perfectly serviceable and totally forgettable, because it doesn’t know how you define your brand voice better than a stranger off the street would. 

So here’s where you write it down. Once. On purpose. No more building on air. 

Define Your Brand Voice Document with the Help of AI 

Every time you open a blank prompt and start typing, you’re basically starting from zero. AI doesn’t know your voice. It doesn’t know the phrase you always reach for, or the one you’d never touch in a million years. So it gives you the only thing it can — something generic. Competent, sure, but it could have been written by anyone, for anyone. And that’s the problem. 

A voice document fixes this. It will be the foundation for all future prompts, and it’s what keeps your actual fingerprints on whatever AI hands back to you. 

Step 1: Collect your best existing content. 

Find three to five pieces of content that exemplify your brand. Start with the pieces people actually reacted to — not shared for a free t-shirt, but the ones where someone commented something like “this is exactly what I needed to hear” or forwarded it to a coworker with “read this.” That reaction is a signal. It means the voice landed, not just the information. Mix it up across formats if you can — a post, an email, a video script. And be honest with yourself: if a piece performed well but doesn’t actually sound like your brand when you read it back, leave it out. Performance isn’t the bar here. Recognition is. 

Step 2: Run the voice extraction prompt. 

Paste those brand samples into AI and ask it to hunt for patterns. What shows up again and again, piece after piece? Which words does the brand keep circling back to, almost like habit? What structural moves does it lean on — short, punchy openers, a certain way it builds toward a point? What does it never do, no matter the format? And underneath all of it, what’s the worldview that keeps surfacing, whether anyone planned it that way or not? 

Here’s the thing. You need to be specific with the ask. Type “what’s this brand’s writing style” and you’ll get back three vague adjectives and nothing you can actually use. Instead, push for real detail. Ask for phrases that repeat. Sentence patterns the brand favors. Topics it seems to avoid without ever saying so out loud. The more concrete your ask, the better the output. And don’t be surprised if some of it catches you off guard. AI is good at spotting habits a brand’s built up over time that nobody in the building ever wrote down. 

Step 3: Write the voice document yourself. 

This is the part AI can’t do for you. Take everything it handed you and turn it into an actual document, in words that reflect the brand — not a copy-paste of the AI’s summary. It should include: 

• Three adjectives that describe the brand’s voice 

• Three that describe what it’s not 

• One sentence that could only have come from this brand, nobody else’s 

• One topic this brand would handle differently than every competitor out there 

• A “never say” list — the jargon, the clichés, the corporate-speak this brand refuses to touch 

AI can analyze the brand’s voice all day. It can’t decide what that voice actually is. That call is yours to make. 

Step 4: Paste the document into every prompt from here on. 

From now on, you need to paste the voice document into every prompt you type, every single time, no exceptions. Not a summary. Not the highlights. The entire document. I know — it’ll start to feel repetitive after the tenth prompt. Do it anyway. The gap between content built on this and content without it shows up fast, and it’s not subtle. 

Here’s what nobody tells you about this document or what it means to define your brand voice: the real value isn’t the document itself. It’s what happens in your head while you’re writing it. You end up naming things about your brand you’d never actually said out loud before — and once you’ve said them, you can’t un-know them. That’s the shift. Not a file in a folder. A brand that finally knows what it sounds like, on purpose, instead of by accident. 

Now that you know how to define your brand voice, let’s talk content pillars.

Using AI to Establish Content Pillars 

Without pillars, a content campaign drifts. One month your brand is chasing a trend. The next, it’s covering whatever came up in a meeting. There’s no throughline, and your audience can feel that, even if they couldn’t tell you why. Pillars fix this. But only if they sit at the right intersection: what your brand genuinely knows, what your audience actually needs, and what your competitors are leaving on the table. Nail that intersection, and you’ve got something you could write about for years.  

Step 1: List your brand’s genuine areas of expertise. 

Skip the mission statement. Skip the “About Us” page too. The real question is simpler: what does your brand know how to do, cold, without having to look it up? Where’s the expertise that’s actually yours, earned instead of claimed? 

Here’s how you find it. Think about the knowledge your brand has that took years to earn — the stuff you know so well you forget other people don’t know it too. That’s not a nice-to-have. That’s your advantage, sitting right there, probably underused. So start writing it down. Every bit of hard-won know-how, even the stuff that feels too obvious to mention.  

Step 2: Cross-reference with your audience frustration map. 

Remember the frustration map from Section 1? Compare it against your brand’s areas of expertise and see where the overlaps occur. Where does something your brand genuinely knows bump up against something your audience is confused or frustrated about? Those overlaps are your pillar candidates. Not everything will line up, and that’s fine. You’re hunting for intersections, not a perfect match for every item on the list. 

Step 3: Run the pillar validation prompt. 

Here’s where AI actually earns its keep. Hand it three things: your brand’s expertise list, the frustration map from Section 1, and the competitor gap analysis from Section 2. Ask it to find three or four pillars sitting right where all three overlap — real authority, real audience need, a real gap your competitors left wide open. Miss any one of those three and the whole thing wobbles. You end up with a pillar that’s hollow, or aimed at nobody, or just a rehash of what’s already out there. 

Now here’s the part that trips people up. A pillar isn’t a category. Take “content marketing” itself. That’s not a pillar — it’s a label, the kind of thing you’d see as a tab on someone’s homepage. Every agency and every brand has a version of it, and it says nothing. A real pillar looks more like this: “Most B2B content fails because it’s written for a job title instead of a person.” That’s a stance. Someone could push back on it. Someone could disagree in the comments. That friction is the tell. It means you actually said something.  

Step 4: Pressure-test each pillar with a “so what” test. 

One question separates a real pillar from something your team just finds interesting: if you published ten pieces on this, would your audience actually be better at their jobs? Not entertained. Not vaguely informed. Better. If yes, keep it. If you’re stretching to make the case, cut it. A pillar has to earn its place. It doesn’t get one for free. 

Three or four pillars. That’s the ceiling, not the floor. Go past that, and you’re not building pillars anymore. You’re just rebuilding the topic list you were trying to escape. 

Foundation-First Content

Here’s the thing about building anything that lasts: you don’t start at the top. You start underground, where nobody’s going to see the work you put in, and you build up from there. 

That’s what this whole process is. Audience research, competitor analysis, a voice document, content pillars — none of it is glamorous. Nobody is going to compliment your frustration map in a meeting. But skip it, and you’re building on air. And eventually, someone asks one simple question — who’s this for, has anyone already said this, does this even sound like us — and the whole thing comes down. 

So build the foundation first: define your brand voice. Figure out who you’re actually talking to, in their own words, not the sanitized version from a strategy deck. Look at what your competitors are already saying, so you’re not just adding to a pile that already exists. Write down what your brand actually sounds like, so AI stops handing you something generic enough to belong to anyone. And find the handful of topics where what you know, what your audience needs, and what nobody else is covering all overlap. 

---

ABOUT ALEXIS

---

If you enjoyed this content and want marketing know-how delivered straight to your inbox, you’ll love our Marketing Minds newsletter. Sign up here>>