A guest profile is a single record representing one person's entire relationship with your restaurant or group — everything you know, from every system, in one place.
The word gets used loosely. Plenty of tools describe a contact record with a visit count as a "guest profile." The distinction is whether it can answer a question a host would actually ask.
What belongs on one
Grouped by the question it answers. If your record cannot answer these, it is a contact, not a profile.
- Who are they — name, contact details, and which source systems they appear in.
- What is the history — visits, dates, locations, spend, and the reservations that did not become visits.
- What do they like — seating preference, dietary requirements, wines, the dish they order every time.
- What matters to them — anniversaries, birthdays, the occasion they usually book for.
- What have they said — reviews, with confidence about whether the reviewer really is them.
- What have we said — campaigns sent, and whether they engaged.
- What are we allowed to do — consent, per channel, with a source.
What does not belong on one
Restraint here is a feature. A profile is read by a host with about eight seconds before a guest reaches the podium.
Subjective commentary about a guest's personality, appearance, or behaviour does not belong in a system of record. Beyond being unpleasant, it is discoverable, it survives longer than the person who wrote it, and it will eventually be read by someone in a context nobody anticipated.
The test: would you be comfortable if the guest read this note. If not, it is not a preference, it is gossip.
Profile versus mailing-list row
The difference is joinability across systems and time. A mailing-list row knows an email address and possibly a first name. A profile knows that this person books under two email addresses, visits three of your concepts, spends most at the wine bar, and last came in eleven weeks ago.
That is not a richer version of the same thing. It is the difference between being able to send an email and being able to decide whether you should.