WhatsApp was built for one phone and one person. Here is a Tuesday on one number with a team behind it.
In turn, by skill, or by rule. Whoever it goes to sees it in their list with their name on it — which is what stops two people answering the same customer and, more often, stops nobody answering at all.
Left in the thread where it belongs, and drawn differently enough that nobody sends it by accident. This is where "rate tight rakhna" and "this one always argues" live, so the next person does not start from nothing.
Shift changes, somebody takes lunch, somebody leaves. The conversation moves with everything in it — the messages, the notes, what was promised. Nothing has to be explained twice.
Type /advance and the text drops in. Yours, not Meta's templates — these only work inside the 24-hour window, and inside it they cost nothing.
WhatsApp only allows ordinary messages for 24 hours after the customer last wrote. After that a normal message says sent and reaches nobody — which reads as a delivery failure rather than a rule, and costs people days before they work it out.
So it is on the composer, with the time left. When it is shut, the box is replaced by the templates that will actually arrive.
Somebody marked away is skipped rather than given work that sits unanswered — which is the version of "fair" that customers notice.