By Felipe Morales, CEO of ESBUENISIMO LINKS
How to define a brand's tone of voice
Tone of voice is what makes a brand sound the same across every channel, even with different people writing the content. A practical guide to defining it and applying it with the social media team.
Two posts on the same topic, written by two different people on the same team, should still sound like the same brand. That's what a well-defined tone of voice achieves — and it's one of the first documents any digital PR or communications agency should build together with the social media manager before publishing the first piece of content.
Why tone isn't a minor detail
Without a defined tone, every post depends on the personal style of whoever wrote it that day. The result is a brand that sounds different on every channel and every month — something audiences perceive, even if they can't name it, as a lack of identity or professionalism.
The axes for defining a brand tone
- Formality: does the brand use a casual or formal register? Industry jargon or plain language?
- Personality: serious and institutional, warm and close, humorous, expert and direct?
- Stance on sensitive topics: does the brand comment on current events or stay neutral?
- Adaptation by channel: the same tone can sound different on LinkedIn (more formal) than on Instagram (more casual) without ceasing to be the same brand.
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An effective tone guide isn't an abstract paragraph ("we're a warm, professional brand") — it's a document with concrete examples: 3-5 real phrases that sound like the brand, and 3-5 that don't, explaining why. That practical comparison is what lets anyone new on the team write in the right tone from day one, without relying on intuition.
Tone also changes during a crisis
A common mistake is keeping the same light, everyday social media tone during a reputational crisis. The tone guide should explicitly cover how the brand's voice shifts when there's an ongoing contingency — generally toward a more sober, informative, and direct register, without losing the underlying identity.
Tone, content calendar, and consistency over time
The defined tone should be reflected in the social media content calendar agreed on with the social media manager each month, so publishing cadence and content type respect that voice consistently over time, not just at the guide's launch.
Frequently Asked Questions
Are brand tone and brand voice the same thing?+
Not exactly. Voice is the brand's constant personality (formal, warm, technical), while tone is how that voice adapts to context — the same profile can sound more serious during a crisis and lighter in entertainment content, without ceasing to be the same voice.
Who should define the tone, the agency or the client?+
Ideally it's a joint effort: the agency or social media manager brings knowledge of what works on each platform, but the final tone should reflect the real identity the company wants to project, validated by whoever owns the brand vision (marketing or communications leadership).
How do you keep the tone consistent when several people write content?+
With a documented tone guide that includes concrete examples: phrases that do sound like the brand, phrases that don't, and how to adapt the tone in special situations (complaints, good news, informational content). Without that written document, tone varies depending on who's writing that day.
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