By assigning segments to customers, we can create customer groups to which we can then define delivery methods, articles or promotions, and products available only to them. 

To assign a segment to a customer you need to:

1. Log in to Administration Panel
2. Go to Client tab
3. Go to edit the details of the customer to whom you want to assign the segment
4. In the edit panel, complete the field values:
   
   • Segment - this is the main customer segment used to define the delivery methods available to the customer and all the settings included in the "Additional segments"
   • Additional segments - additional customer segments used to define items, promotions or products available to the customer
5. Press the "Update" button to save the changes