A WhatsApp broadcast can bring in more replies in an hour than an email campaign does in a week. It can also get your number restricted if too many people block you or report the message. The difference between the two outcomes is rarely the offer. It is who you send to, what you send, and how often.

This guide covers the rules that keep a business number healthy, written for small teams that send broadcasts themselves.

What "restricted" actually means

Meta gives every WhatsApp Business number a quality rating: green, yellow or red. It is based on how people react to your messages over the last few days, mainly blocks and reports. When the rating drops, Meta first lowers how many people you can message in a day. If it keeps dropping, your templates can be paused and the number can be flagged.

None of this happens because you sent one message too many. It happens because a share of the people who received it did not want it.

1. Only message people who agreed to hear from you

Opt-in is the single biggest factor. A customer who ticked a box at checkout, messaged you first, or asked for updates in a form is unlikely to block you. A number copied from an old spreadsheet or bought from a list is very likely to.

Ask for WhatsApp consent in plain words: "Send me order updates and offers on WhatsApp."
Record when and where each person opted in.
Do not reuse consent given for SMS or email. Ask again.

2. Use the right template category

Outside a customer's 24-hour reply window, WhatsApp only lets you send pre-approved message templates. Each template has a category:

Marketing for offers, launches and reminders that sell something.
Utility for order, booking and account updates the customer expects.
Authentication for one-time codes.

Putting a promotion inside a utility template to save money is the fastest way to get the template rejected or reclassified. It also annoys people who expected a delivery update. Keep each template honest about what it is.

3. Make every broadcast worth opening

People block messages that feel generic. They rarely block a message that is useful to them. Before you send, ask whether the person would be glad to get it.

Lead with the reason you are writing: "Your size is back in stock" beats "Big news from us!"
Keep it short. One idea per message.
Add buttons for the obvious next step, such as "Shop now" or "Talk to us", so replying is easy.

4. Send to smaller, relevant groups

Sending every offer to every contact is how quality ratings fall. Split your contacts into lists or segments: recent buyers, people who asked about a product, customers in one city. A smaller, relevant send gets more replies and far fewer blocks than a big generic one.

5. Make opting out easy and respect it

If someone cannot find a way to stop your messages, they will block you instead. Blocks hurt your rating. An opt-out does not.

Include a clear way to stop, such as a "Stop promotions" button.
Remove people from future marketing sends as soon as they opt out.
Never message an opted-out contact again "just this once".

6. Watch frequency

There is no magic number, but most small businesses do well with one marketing message a week or less. Meta also limits how many marketing messages each person receives from businesses overall, so some sends may not be delivered to people who already got several that day. More messages do not mean more reach.

7. Be ready for the replies

A good broadcast starts conversations. If replies sit unanswered for hours, people feel ignored and the next broadcast lands worse. Plan who answers, or let an AI assistant handle the common questions and pass the rest to your team.

How IotaBot helps

IotaBot sends WhatsApp campaigns from your own number using your approved templates, to contact lists or segments you choose. Opt-outs are honoured automatically, and every reply lands in the same inbox where the AI answers common questions from your knowledge base and hands the rest to a person. One limit to know: campaign templates are sent with fixed content, so per-contact variables such as a first name are not filled in.

See how it works on the WhatsApp broadcast page, or estimate what a send will cost with the WhatsApp cost calculator.