brotherton-erpnext/erpnext/docs/user/guides/CRM/setup/customer-group.md

Customer groups allow you to organize your customers. You can also have discounts based on customer groups.
You can also get trend analysis for each
group. Typically Customers are grouped by market segment (that is usually
based on your domain).

<img class="screenshot" alt="Customer Group Tree" src="assets/img/crm/customer-group-tree.png">

> Tip: If you think all this is too much effort, you can leave it at “Default
Customer Group”. But all this effort, will pay off when you start getting
reports. An example of a sample report is given below:

![Sales Analytics](assets/old_images/erpnext/sales-analytics-customer.png)

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