See it work
A Dhoraji oil mill and a plastics unit, message by message
Put an illustrative edible-oil mill and an illustrative plastics unit in Dhoraji side by side. Each row is one kind of WhatsApp message; the categories are the same, the readers and the words are not.
Most of either firm's WhatsApp day is the second row: a buyer asks, someone answers, and the 24-hour service window means no template is needed. Every reply is charged at the service rate.
The marketing row is the one that needs care. WhatsApp's policy allows a business to contact people only with their opt-in and requires it to honour every request to stop. The India guide covers consent under the DPDP Act.