Master data on the ticket, not only in the chat
Without tidy master data, the operator reopens chats and wonders “who is this? what terms do they have?”. With Contacts and Companies the context travels with the ticket: name, company (#code), Private, alerts and notes — already in the list and in the chat header.
Scope is per phone account: each WhatsApp number linked to Quoting24 via Meta APIs has its own contacts, companies and delivery shifts. If you manage multiple lines, data stays separated.