# Postscript

Postscript offers a streamlined process to drive conversions through targeted SMS messaging by building your own workflows using timers and triggers powered by incoming events from your Shopify store.

{% hint style="warning" %}
Note that adding this channel requires the [Postscript Shopify App](https://apps.shopify.com/postscript-sms-marketing) to be installed prior to adding the channel. See the [Onboarding page](/channels/postscript/onboarding.md) for more details.
{% endhint %}

### Details

Channel name: postscript

### Event Flow

We send all events through server-side calls to the Postscript ingestion endpoint. Postscript only accepts these events if either the **phone** or **email** properties are set for the user generating these events.

### Useful Links

{% embed url="<https://apps.shopify.com/postscript-sms-marketing>" %}

{% embed url="<https://app.postscript.io/account/api>" %}


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