What role does WhatsApp reply speed play?

If the ad promises a message, the reply while the customer is still looking at the phone is the one that converts. An answer the next day arrives when they have already booked somewhere else. On one test day, time how long the first “hello” from the ad waits for a reply. If it runs past service, the ad cannot say it is immediate. At a Madrid lunch the ad’s WhatsApp sits unread until coffee. Those bookings went to whoever answered. The ad schedule matched to the hours the chat is read, and a quick reply that asks the day and the number of people. Outside those hours, the button is not the chat.