> For the complete documentation index, see [llms.txt](https://docs.1send.net/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.1send.net/learn/analytics/revenue-attribution.md).

# Revenue Attribution

Attribution helps you better identify which messages are more successful at driving the ultimate goal, revenue conversion.

{% hint style="warning" %}
Revenue attribution is possible only if the Shopify app is installed. [Read more](/guides/integrations/shopify.md)
{% endhint %}

### Default Attribution Window

By default, 1send calculates attribution based on if a subscriber clicks the message link and makes a purchase within 7 days. But you can [adjust these windows](#adjust-attribution-window) in your account settings.

Using the default settings as an example:

{% stepper %}
{% step %}

### Day 1

Message is sent to your subscriber and they open it.
{% endstep %}

{% step %}

### Day 2

The subscriber opens the message again and clicks the message link to a product offer.
{% endstep %}

{% step %}

### Day 5

They ultimately come back and purchase the product.
{% endstep %}
{% endstepper %}

In this example, the purchase is attributed to message campaign since it's with 7 days of the subscriber clicking the link. However, if the customer were to make the purchase on day 10, then this would not be attributed to 1send.

### Adjust Attribution Window

You can change the attribution window days by going into **Settings → Account**

<figure><img src="/files/sWgApEK2MxhMqBRZUAWW" alt=""><figcaption></figcaption></figure>

Change the number of days and click **Save**