UX Design
Voice & Tone
Voice is a product's consistent personality in writing — the traits that stay the same everywhere. Tone is how that voice adapts to the moment, shifting with the user's situation.
Why it matters
A clear voice makes a product feel like one coherent thing rather than text written by many different people. Adjusting tone to the moment keeps the product from sounding cheerful during a failure or stiff during a celebration.
In depth
The common mistake is treating the two as one: a product can have a single voice yet many tones. Voice is decided once and documented; tone is a choice you make per screen by reading the user's emotional state. Be reassuring in an error, plain in a settings page, and lightly celebratory at success, all while sounding like the same product.
Real-world example
Slack keeps a warm, human voice throughout, but its tone turns gently apologetic in an error and playful on an empty inbox.
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