brotherton-erpnext/erpnext/docs/user/manual/en/CRM/setup/sales-person.md

Sales Persons behave exactly like Territories. You can create an organization
chart of Sales Persons where each Sales Person’s target can be set
individually. Again as in Territory, the target has to be set against Item
Group.

<img class="screenshot" alt="Sales Person Tree" src="{{docs_base_url}}/assets/img/crm/sales-person-tree.png">

####Sales Person in Transactions

You can use this Sales Person in Customer and sales transactions like Sales Order, Delivery Note and Sales Invoice.
Click [here]({{docs_base_url}}/user/manual/en/selling/articles/sales-persons-in-the-sales-transactions) to learn more 
about how Sales Persons are used in the transactions of Sales Cycle.

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