Using WhatsApp for sales without being a spammer

Start with permission, because everything else depends on it. A person who messages you first about a product has started a conversation, and you can reply to that. A person who bought from you last year has not necessarily agreed to receive your offers. A number you took from a directory, a group or a friend's contact list has not agreed to anything. WhatsApp's own business messaging policy says that businesses may contact people on the platform only if they have the person's number and have the person's opt-in permission confirming that they want to receive messages from that business. The policy also says businesses must respect requests to block, discontinue or opt out of communications, and must not mislead or spam people. Read it yourself on WhatsApp's business pages, because policies are updated.

In practice, getting permission is simple and polite. Ask at the point of sale: "May I send you updates about new stock and offers on WhatsApp? You can tell me to stop anytime." Ask in the first chat, after you have answered the customer's question and not before. Put a line on your bill or your shop board. Say what you will send and roughly how often, so there are no surprises. Then keep a simple record: name, number, date, how they agreed, and what they agreed to. A page in a notebook or a column in a spreadsheet is enough.

There are other rules to be aware of beyond WhatsApp's own. In India, telecom regulations from TRAI cover commercial calls and text messages, including registration of businesses that send promotional messages in bulk, customers' preferences about being contacted, and consent. Those rules were written for calls and SMS, and whether and how they apply to messaging apps is not something this guide can settle. If you plan to contact many people for promotion, check the current TRAI rules and the terms of any provider you use, and take professional advice if you are unsure. When in doubt, the safest practice is the same one: contact only people who have clearly asked or agreed.

One feature is worth understanding. On the free WhatsApp Business app, broadcast lists only reach people who have saved your number in their phone. That is a built-in limit, and a reasonable one. Do not try to get around it with extra numbers, group-adding or unofficial bulk-sending tools. These can put your number at risk, and losing a number can mean losing years of customer conversations.

Now think about what to send. The best business messages on WhatsApp are replies. Someone asks, you answer quickly and clearly. Start with a greeting that names your business, answer the question, and ask one question back to understand the need. Use saved replies for common questions such as price, timings, address and delivery, but edit them so they fit the person. A message that obviously ignores what the customer said is worse than a slow one.

For outgoing messages, ask yourself three questions. Is it useful to this person? Is it specific? Is it easy to answer? A message that says "Your order is ready for pickup until 7 pm today" passes. A message that says "Big sale! Visit us!" to your whole contact list does not. If you are sending an offer, say who it is for and why: "For customers who bought a mixer in the last year: servicing at a reduced price until Saturday." Put the key detail in the first line, add one photo if it helps, and end with a simple next step. Do not send three messages when one will do.

Frequency matters as much as content. Many people mute a business after a few messages in a week that have nothing to do with them. A sensible starting point for a small shop is far fewer messages than you think: perhaps one useful update every week or two, only to people who agreed to those updates. Watch for signs that you are overdoing it: no replies, people leaving, people muting or blocking. If you can see read receipts, notice who never opens.

Handle opt-outs without argument. If someone writes "stop", "please remove me" or anything like it, reply once with a short thank-you and confirmation, remove them from your list and make sure no one else in your business messages them. Do not try to win them back in the same message. Blocks and spam reports can put your number at risk, so treat each request to stop as feedback.

Treat people's numbers with care. Do not add customers to groups without asking first, because it exposes their number to strangers. Do not share a customer's chat, photo or details with anyone who does not need them. Be wary of messages from "customers" asking you to click strange links or approve payments.

A simple checklist to finish. Do I have permission from each person on this list? Do I know how and when they gave it? Is this message useful and specific to them? Can they say stop easily? Have I removed everyone who asked? Have I checked the current WhatsApp policy and relevant rules recently? If any answer is no, fix that before sending.