What is a WhatsApp broadcast?

A broadcast on WhatsApp is a message sent to several people at once, but each contact receives it as an individual chat. It is not a group: the recipient does not see the others, and it only arrives if they have your number saved in their contacts. In WhatsApp Business, this feature is used for announcements, promotions, or updates, and it is one of the most practical tools for communicating with customers without losing the personal touch.

Why does it matter to an SME?

For a small business, broadcasting is a direct, low-cost way to reach customers who already know you. Unlike posting on social media (where the algorithm decides who sees you), the broadcast reaches the WhatsApp inbox, where people actually read. Also, since it is an individual chat, the open rate is usually much higher than that of a newsletter.

Concrete example

Imagine you run a grocery store and tomorrow is a holiday. With a broadcast, you can notify your 200 regular customers that you will be open only until 13:00. Each one receives the message as if you sent it only to them, and they can reply without any issues. However, it only reaches those who have your number saved. If they haven't saved it, they won't see it.

Common mistakes when using broadcasts

• Sending to the entire contact list without segmenting: it can annoy people and get you blocked.
• The customer not having your number saved: the message doesn't arrive (it's a WhatsApp limitation, not your fault).
• Using spammy language: if it looks like misleading advertising, you can be reported.
• Not measuring results: if you don't know how many replied, you can't improve next time.

How do you create a broadcast?

1. 1Go to the 'Updates' tab in WhatsApp Business (or the broadcast icon in regular WhatsApp).
2. 2Choose 'New list' or 'New broadcast'.
3. 3Select the contacts (only those who have you saved in their address book).
4. 4Write the message and send.

How it works in practice: the case of a bakery

Imagine a neighborhood bakery in Buenos Aires that wants to announce that on Thursdays there's a promo on pastries. With broadcast, the owner creates a list with the 150 customers who have his number saved and sends a simple message: 'Hi! This Thursday pastries are 2-for-1. Come by before 12:00, they sell out fast'. Each customer receives it as an individual chat, and those who reply 'How long does the promo last?' generate a real conversation.

The secret is in segmentation. If the bakery sends the same promo to all contacts, including those who only buy bread, the message is annoying. What works: tagging customers by what they buy (pastries, cakes, savory items) and sending specific broadcasts. That way, the person receiving the message feels it's addressed to them, not that they're getting random advertising.

And here's where WhatsApp's limit comes in: if the customer doesn't have your number saved, the message doesn't get through. That's why the bakery has a sign at the counter: 'Save our number and receive the promos'. It's the simplest way to make broadcast work.

What it gets confused with: broadcast vs. transmission vs. campaign

WhatsApp broadcast is confused with two things: transmission and campaign. Transmission is a technical term used by messaging APIs to refer to mass sending; in practice, it's the same as a broadcast, but done with tools like Wando, which use Meta's official API. A campaign, on the other hand, is a broader concept: it includes the broadcast, but also reply tracking, statistics, and segmentation.

So, a broadcast is the act of sending the message; the campaign is the whole plan around it. A business that sends a broadcast without measuring results does only half the work. With a campaign, you know how many opened it, how many replied, and which messages worked best.

The key difference with a group: in a broadcast, each chat is private. In a group, everyone sees each other. That changes the dynamics: broadcasts are for communicating, groups are for conversing.

What happens if you don't use broadcasts: the cost of inaction

If your business doesn't use broadcasts, you're leaving money on the table. Think of it this way: every customer who bought from you once already knows you, but if you don't notify them about your promos, they forget you exist. Social media isn't enough: Instagram's algorithm decides who sees your posts, and most of your customers don't see them. Broadcasts, on the other hand, go straight to the WhatsApp inbox, which is where people check their phones 50 times a day.

The concrete cost is repeat purchases. A customer who receives a promo alert comes back; the one who receives nothing buys when they remember, and that could be never. In a sector like food service, where purchase decisions are impulsive, a well-crafted broadcast can fill your place on a Thursday afternoon.

Not using broadcasts also leaves you without data: you don't know who responds, which time works best, or which messages convert. It's like selling with your eyes closed.

How it relates to Meta's official API

Broadcasts sent from the WhatsApp Business app have a limit: they only reach people who have saved your number. Meta's official API (WhatsApp Cloud API) changes the rules: you can send messages to customers who haven't saved you, as long as they've started a conversation with you before (or have opted in to receive messages).

With the API, broadcasts are managed using templates (HSM). These are messages pre-approved by Meta that are sent in bulk. The approval process can take up to 48 hours, and conversation prices vary by country: there is no single fee, so it is a good idea to check Meta's official documentation.

Tools like Wando connect to this API and give you an inbox where AI suggests replies and your team approves them with a click. That is human-in-the-loop: AI proposes, humans decide. It is not a robot that replies on its own without supervision.

When NOT to use broadcasts

Broadcasting is not for everyone. If your business sells high-value products with long purchase cycles (for example, real estate), a mass promo message can seem desperate. In that case, more personal, one-on-one communication is better.

It also does not work for customers who do not know you. If you want to attract new people, broadcasting will not help: the official API requires them to have interacted before, and the regular app requires them to have you saved in their contacts. To attract new customers, you need social media, ads, or referrals.

And beware of overuse: if you send broadcasts too often, people will block you. The golden rule is that every message has clear value for the recipient. If you have nothing to say, do not send anything. Message quality matters more than quantity.

Common mistakes made by beginners

Mistake number one is sending the broadcast to your entire contact list without segmenting. That leads to blocks and reports. The second mistake: not testing the message first. Send it to yourself, check that it has no errors and that the tone is right.

Another classic mistake is not measuring. If you send a broadcast and you don't know how many replied, you're throwing money away. With the WhatsApp Business app, statistics are basic; with tools like Wando, you see message and campaign metrics on a dashboard.

There's also the one who expects the broadcast to work magic: a generic message like 'Hello! We have offers' doesn't work. The message has to be specific, with a concrete offer and a clear call to action. And the one who doesn't understand the contact list limitation: if the customer hasn't saved you, they won't receive it. That's not your fault, but you have to work to get them to add you.