What is a message template (HSM)?
A message template (HSM, for its acronym in English: Highly Structured Message) is a predefined message that a business can send to a WhatsApp user without the user having initiated the conversation. Meta requires these templates to be approved before use, and they are used for sending things like purchase confirmations, shipping notifications, or appointment reminders.
For an SME, templates are the only legal way to contact the customer first on the WhatsApp Business API. Without them, you can only respond when the customer writes to you first. Therefore, having approved and well-written templates is key for proactive campaigns and for maintaining smooth communication.
Why do templates exist?
Meta created them to prevent spam. By requiring prior approval, it ensures that messages are relevant and expected by the user. Additionally, templates have sending limits and can be periodically reviewed. This protects the user experience and maintains trust in the platform.
Concrete example for an SME
Imagine you have a clothing store. A customer wrote to you a week ago asking about a pair of jeans you did not have in stock. With an approved 'notification' type template, you can send them: 'Hello [name]! The jeans you were looking for have arrived. Should I reserve them for you? Reply to this message and we will coordinate.' The customer receives your message even though they did not initiate the conversation, and they can reply from the same chat.
Common mistakes when using templates
- Not having approved templates: without approval, you cannot initiate conversations.
- Using excessive promotional language: Meta may reject them or limit your number.
- Not personalizing: templates support variables (like name), but if you use them incorrectly, the message feels robotic.
- Sending too frequently: even if you have templates, spam is still penalized.
Approval times and sending limits vary depending on the template type and region. Consult Meta's official documentation for the exact numbers.
Tools like Wando, which integrate with the WhatsApp Business API, allow you to manage templates and send them from a unified inbox, although always under your team's supervision.
How an HSM template is used in practice
Imagine you have a real estate agency in Córdoba. An interested person wrote to you about an apartment, you chatted for a while, and they said they'd 'think about it'. Three days passed and they didn't write back. With an approved notification-type template, you can send: 'Hi [name], are you still interested in the apartment at [address]? We have an open viewing on Saturday at 11:00. Would you like to sign up?'.
The customer receives the message even if they haven't started the conversation. If they reply, a 24-hour window opens where you can then respond with free-form messages, without a template. That's the typical flow: template to reactivate, normal conversation to close.
In Wando, templates are managed from the inbox. You load them, approve them, and send them with one click. The AI can suggest the text, but the final decision is made by your team.
What an HSM template is often confused with
The most common confusion is thinking that an HSM template is the same as an automatic welcome message or a chatbot. That's not the case. A welcome message is sent when the customer writes to you first; an HSM template is used when you initiate the conversation.
Another common confusion is with quick replies. Quick replies are shortcuts to respond within an existing conversation. HSM templates are pre-approved messages that break the ice.
It is also confused with a simple text saved in a notepad. The difference is that an HSM template goes through a Meta approval process and is subject to usage policies. It is not copy-paste; it is a regulated message.
What happens if you don't use HSM templates
If you don't use HSM templates, your business is limited to responding. You cannot start conversations. That means you lose the opportunity to reactivate customers who have gone cold, notify about promotions, or confirm appointments without the customer making the first move.
In practice, a business without templates depends on the customer remembering to write again. And that doesn't happen often. Based on our experience, most sales are lost in the silence after the first contact.
Also, without templates you cannot run proactive campaigns. If you want to notify 200 customers that new stock has arrived, you have no way to do it. You're left with a reactive WhatsApp, waiting for them to reach out.
How it relates to Meta's official API
HSM templates are a core component of Meta's WhatsApp Cloud API. The API is the infrastructure that allows businesses to send messages at scale, and templates are the only type of message that can be sent outside the 24-hour window.
When you create a template, you send it to Meta for approval. The process can take up to 48 hours. Once approved, you can use it to start conversations. Meta also charges for each conversation started with a template; prices vary by country and are listed in their official documentation.
Wando connects to this official API, so the templates you manage from the platform comply with Meta's rules. There are no shortcuts or tricks: it's the legal and safe way.
When NOT to use HSM templates
HSM templates are not for everything. If your business is small and you only handle inquiries that come in on their own, you might not need them yet. The time investment in creating and maintaining templates may not be justified if you don't do proactive sending.
They are also not suitable for long and complex conversations, like a sales negotiation with many back-and-forths. There, the best approach is to respond in the moment, within the 24-hour window, with free-form messages.
And be careful: if the customer didn't explicitly give you their number or isn't expecting your message, a template can feel invasive. Meta is strict about that. If the user blocks or reports you, your number can be restricted. Use them wisely.
Common mistakes of those new to templates
The first mistake is thinking that an HSM template is just another message. No: it's regulated and has rules. The second is not personalizing. Templates allow variables like the name or order number. If you don't use them, the message feels cold and generic.
Another error is not having a contingency plan. If Meta rejects your template, what do you do? Many businesses become paralyzed. The solution is to have several pre-approved templates for different scenarios.
Finally, the most costly error: sending templates without supervision. Even if AI suggests texts for you, the final responsibility is yours. A mistake in a mass send can cost you clients and the reputation of the number. Always review before sending.
Frequently asked questions
How long does it take for an HSM template to be approved?+
The approval time varies according to Meta and can range from a few hours to several days. There is no fixed number; the best thing is to check the official documentation and plan your sends in advance.
Can I send an HSM template without the customer having written first?+
Yes, that is exactly the function of templates. They allow you to start a conversation with a user who has not contacted you, as long as the template is approved and you comply with Meta's policies.
What is the difference between an HSM template and a normal WhatsApp message?+
A normal message can only be sent within a 24-hour window from the customer's last message. An HSM template is used to start the conversation outside that window, and it must be pre-approved by Meta.
Can I personalize an HSM template with the customer's name?+
Yes, templates support variables such as the name or order number. You just need to define them when creating the template and then fill them in when sending the message.
Can I send an HSM template to a customer who never wrote to me?+
Yes, as long as the template is approved and the message is relevant. But be careful: if the customer did not give you their number or did not expect your message, they may feel invaded. Meta is strict about that and can limit your number if there are reports.
Can HSM templates be used for marketing campaigns?+
Yes, but with restrictions. Meta approves marketing templates, but they usually have more limits and can be rejected if they are too promotional. The best thing is to use them for useful notifications (like shipping alerts) and reserve marketing for customers who already know you.
What happens if Meta rejects my template?+
You can edit it and resubmit it. The rejection is not final, but if it happens repeatedly, your number can be flagged. Review Meta's policies and adjust the message so it is clear, useful, and not spam.
How much does it cost to send an HSM template?+
It depends on the country and the type of template. Meta charges per conversation initiated with a template, and prices vary. I recommend checking Meta's official documentation for the exact amounts, because they change frequently.