There’s a document that should exist at every company before anyone writes a line of product copy, a sales deck, or a website headline. Most early-stage companies don’t have it. Or they have a version of it … a logo file in a shared drive, a slide in the original pitch deck, a “we use blue and white and keep it clean” verbal agreement that lives only in the founder’s head.
I’m talking about the brand guide. And if you’re doing PMM without one, you’re building a castle of sand.
What is the Brand Guide?
Let’s be specific on this one, because “brand guide” can mean a lot of different things to different people, and they do vary in structure and content.
To me a brand guide has two layers. The first is visual: your logo and its rules for use, your color palette with exact hex codes, your typography system (dare I say … font), your iconography and illustration style, your photography direction and stock photo selection. The second is verbal: your brand voice, your tone across different contexts, your language do’s and don’ts, your preferred terminology and the words you explicitly avoid.
Together, they answer one question: what does this company look and sound like? and deliver one outcome: how will you be perceived.
That question is more important than it sounds. Because without a clear answer, you will end up with a broad selection of perceptions and understandings, leaving the answers up to the person who consumes your content. If your designer picks fonts that feel right to them, your sales team writes an email that sounds nothing like the website, your PMM writes a narrative that’s technically accurate but somehow feels off-brand in a way nobody can quite articulate, then what is really happening is you have a collection of individuals operating as a collective. Everyone is making reasonable individual decisions. The output is a brand that looks and sounds like it was assembled by committee. Because it was.
The brand guide is the asset that sets the baseline that drives the consistency you want.
The Layer Underneath Messaging
The brand guide and style guide you now have, is the underpinning meme for all your PMM content and assets.
Most of the work that PMMs talk about, positioning, messaging, narratives, launch copy, sales enablement, it all lives at the product level. What does this product solve? For this buyer? Why now? That’s the Messaging Source Document (MSD), or your Messaging and Positioning Framework (MPF) if you prefer that format. Critical infrastructure. Can’t do PMM without it.
But the MSD lives on top of something. The company brand. The thing that answers: what is this company’s voice? What does it feel like to read anything we produce? What are the words we’d never use? What’s the promise we make before anyone even opens the deck?
Think of it as a stack. The brand guide sets the container. The MSD fills it with product-specific content. Every piece of external communication you produce, web pages, sales materials, event signage, social posts, launch announcements, all of it gets poured from that container.
If the container is undefined, inconsistent, or sitting in someone’s memory rather than written down… the whole stack is unstable.
What Goes in a Real Brand Guide
To my Brand friends, I’m sorry. I’m about to completely defile your discipline. I am not the expert here, and this is from the viewpoint of a PMM … so here we go … I break it into the two layers mentioned above.
The Visual Layer
Your logo rules matter more than you think. Not just “here’s the file.” How much clear space does it need? What are the approved color variants? What are the explicitly prohibited uses? (Rotated logos, stretched logos, logos on clashing backgrounds … you’d be surprised what happens when there’s no rule against it.)
Your color palette should include primary, secondary, and accent colors with exact hex codes, RGB values, and ideally Pantone references if you ever print anything. Every designer who touches your brand needs the same numbers, not “a dark blue” or “similar to this.”
Typography is often where brand coherence falls apart at scale. Specify your heading font, your body font, your fallbacks for web vs. print vs. presentations. Include examples of how they work together. Don’t leave it to interpretation.
Photography and illustration direction tells people what your visual world feels like. Aspirational lifestyle? Clean and technical? Real customers in real moments? If you can’t describe it in a sentence, you can’t brief a photographer or a stock image searcher.
The Verbal Layer
This is where PMM lives most directly.
Voice is who you are as a brand. It’s consistent. Your voice doesn’t change between a LinkedIn post and a product release note and a sales email. It’s the personality behind the words.
Tone is how that voice expresses in different contexts. Your voice might be confident and direct. Your tone in a crisis communication is different from your tone in a product launch. Same personality, different room.
Your language do’s and don’ts are, in my experience, the most practically useful section of any brand guide for day-to-day PMM work. This is where you list the words and phrases that are you… and the ones that are explicitly off-limits. Competitors’ brand terms you avoid. Jargon that doesn’t match your positioning. Words that have baggage in your category. The specific verbs that capture what your product does versus the generic ones that make you sound like everyone else. (AI note: my claude.md file includes a list of phrases I personally despise … world class, military grade …)
Note: this section is where you also list your internal shorthand and whether it appears in external copy. “We say ICP internally but ‘ideal customers’ in web copy” is a real and useful rule.
How This Flows Into PMM Work
Once the brand guide exists and is agreed, it becomes the first input into everything PMM produces.
Your MSD should be written in the brand voice, use the approved terminology, and reflect the verbal layer of the guide. That means when AI helps you draft messaging, the first thing you feed it isn’t just your product specs… it’s the brand guide. You’re giving the vibe engine a context it can actually use. And then you review the output against the guide before it ships. Zero-Trust applies here: AI can match style patterns, but it doesn’t have taste. You do.
Your website copy flows from the MSD, constrained by the brand guide. The hierarchy is clear: brand at the top, product messaging in the middle, execution at the bottom.
Your sales enablement materials, decks, one-pagers, battlecards, email templates, all follow the same hierarchy. A salesperson picking up your one-pager should feel the same brand they see on the website and heard in the webinar. The buyer’s experience of your company should feel coherent across every touchpoint … because it’s drawing from the same source.
That coherence is not a nice-to-have. It’s what builds recognition and trust over time. Buyers see your company a dozen times before they’re ready to talk. If those twelve impressions feel like twelve different companies, you’ve spent twelve moments failing to build memory. If they feel like one company with a clear, consistent point of view… each impression compounds.
Compounding brand impressions is one of the most underrated advantages in competitive markets. It’s free, it’s durable, and it takes discipline to build. Not creative genius. Discipline.
What To Do When You Don’t Have One
If you’re at an early-stage company and the brand guide doesn’t exist yet, you have two options.
The first is to go build it. If you have a designer on the team or access to one, this is worth the investment. Even a lightweight version, a single document that captures the essentials of each layer, is dramatically better than nothing. PMM should be pushing for this to exist, even if design does the execution. You are the person who most needs it to exist.
The second, which I see more often, is to work backwards from what’s already been built. Look at the founder’s communication style. Look at what the website says now. Look at the sales materials that are actually working. Describe what you observe, not as “this is the ideal brand” but as “this is what we already are.” Document it, use the robots to codify it. Get sign-off. Now you have a starting point.
Either way, the goal is the same: get it out of people’s heads and into a document everyone can read, reference, and build from.
PMM cannot be the connective tissue between Product, Sales, and Marketing if the thing connecting them is ambiguous. The brand guide is what makes the message consistent at scale. Before the team grows. Before the AI generates your first draft. Before the first campaign launches and you realize everyone had a different idea of what the company sounds like.
Write it down. Agree on it. Build from it.
Adam