Tone of voice is how a brand speaks—its personality, values, and language choices. It's the "how" of communication: the vocabulary, sentence structure, humor, formality level, and emotional tone. Consistent tone builds brand recognition, trust, and audience connection. It's why Apple sounds different from Microsoft, and Netflix sounds different from HBO. Tone spans all communications: website copy, emails, support chats, social media, ads, presentations, even internal messages.