How To Find a Shopify Customer Segment ID

1. From your Shopify admin, go to Customers > Segments.
2. Click the customer segment you want to find the ID for. 
3. Examine the URL in your browser's address bar. Your URL should be similar to the following URL example:

https://admin.shopify.com/store/my-shop-name/customers/segments/123456789	

The number after /segments/ is the Customer Segment ID number. In this example, the Customer Segment ID is 123456789.