# Messaging with WhatsApp FAQ's

* [Is two-way messaging possible with WhatsApp?](#h_01F4XRA6JY5DKCW08XM2CMCAVQ)
* [Is there a limit to the number of WhatsApp messages I can send?](#h_01F4XRAB2HJKQ5716BK2T0RG6Z)
* [Can I send group messages via WhatsApp?](#h_01F4XRAFBY1SV6TQJ07XHXN5WJ)
* [Do customers need to opt in to receive WhatsApp messages from my business?](#h_01F4XRAKKFFGHNJPNVT2B3RT77)
* [Can I send messages outside the 24-hour window?](#h_01F4XRAKKFFGHNJPNVT2B3RT77)

#### Is two-way messaging possible with WhatsApp? <a href="#h_01f4xra6jy5dkcw08xm2cmcavq" id="h_01f4xra6jy5dkcw08xm2cmcavq"></a>

Yes, it is. WhatsApp Business differentiates between conversations that are initiated by your business and conversations that are initiated by the customer. When you initiate a conversation with your customer, you are limited to the use of pre-approved message templates. Whenever your customer initiates a conversation or replies to your message template, however, a 24-hour support window will open during which you are able to communicate freely with your customer. These messages are called session messages, and the 24-hour window is reset every time you receive a new reply from the customer.&#x20;

You can read more about Message Templates and Session Messages here: [What is the difference between Message Template and Template Message?](/connectivity-platform/messaging/message-templates-and-session-messages.md)

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#### Is there a limit to the number of WhatsApp messages I can send? <a href="#h_01f4xrab2hjkq5716bk2t0rg6z" id="h_01f4xrab2hjkq5716bk2t0rg6z"></a>

There are some limitations imposed by Meta / WhatsApp that you must keep in mind:

More details about tiers can be found [here.](https://support.messagebird.com/hc/en-us/articles/6582770445329)

We also recommend reviewing our article for quality rating [here](https://support.messagebird.com/hc/en-us/articles/6582567357841)

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#### Can I send group messages via WhatsApp? <a href="#h_01f4xrafby1sv6tqj07xhxn5wj" id="h_01f4xrafby1sv6tqj07xhxn5wj"></a>

Group messaging for the WhatsApp Business API is currently not supported by Facebook.<br>

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#### Do customers need to opt in to receive WhatsApp messages from my business? <a href="#h_01f4xrakkffghnjpnvt2b3rt77" id="h_01f4xrakkffghnjpnvt2b3rt77"></a>

If you want to initiate a conversation with your customers using a Message Template, your customers will need to have shared their mobile phone numbers with your business and [opted in](/connectivity-platform/getting-started/whatsapp-why-and-how-to-get-your-customers-to-opt-in.md) to receive messages. Your customers are also free to initiate a conversation with you, without previously having opted in.

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#### Can I send messages outside the 24-hour window? <a href="#h_01f4xrakkffghnjpnvt2b3rt77" id="h_01f4xrakkffghnjpnvt2b3rt77"></a>

In order for you to initiate a conversation outside the 24-window, you need to send a Message Template. Message Templates must be pre-approved by Facebook before you can use these to prevent companies from sending unapproved messages to their customers. Read more here about Message Templates and how to use them: [Message Templates guidelines](/connectivity-platform/getting-started/working-with-whatsapp-message-templates.md).


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