Tone is not what you say but how you say it. The same refund policy can be explained in two stiff sentences or in three warm ones. Larger companies write tone guides; small businesses usually have a tone without ever writing it down, and it lives in the replies they have already sent.
Why it matters
Customers notice when a reply does not sound like you. A shop known for friendly, short answers that suddenly sends a paragraph of corporate phrasing feels like a template, or like a stranger. When several people answer the inbox, or when an AI tool drafts replies, a clear sense of the tone keeps every reply sounding like the same business.
Tone also changes with the situation. The voice stays the same, but a complaint about a lost parcel gets fewer exclamation marks than a thank-you note.
An example
One business opens with “Hi Sam,” answers in two sentences, and signs off “Cheers, Lotte”. Another writes “Dear Mr Carter,” and closes “Kind regards, the customer service team”. Both are fine; mixing them is not.
See what “learns your tone” actually means and keeping several people’s replies consistent.