die Kundin
female customer
A female person who buys a product or uses a service.
Die Kundin war mit der Beratung sehr zufrieden und kaufte das Kleid.
The customer was very satisfied with the advice and bought the dress.

customer
Loading your saved state.
female customer
A female person who buys a product or uses a service.
Die Kundin war mit der Beratung sehr zufrieden und kaufte das Kleid.
The customer was very satisfied with the advice and bought the dress.

'Die Kundin' (the female customer) is the feminine form of 'der Kunde' (the male customer). The ending '-in' is used very frequently in German to form the feminine form of professions or labels.
Der Verkäufer berät eine Kundin.
The salesperson is advising a female customer.
The word belongs to the word family around 'Kunde' (customer). If you understand 'Kundin' (female customer), you will also recognize related terms such as 'der Kundenservice' (customer service), 'die Kundenkarte' (customer card), or 'kundenfreundlich' (customer-friendly) more easily.
Als treue Kundin erhalten Sie bei uns einen Rabatt.
As a loyal customer, you receive a discount from us.
Common adjectives used with 'Kundin' (female customer) are 'zufriedene Kundin' (satisfied customer), 'neue Kundin' (new customer), or 'langjährige Kundin' (long-standing customer).
Eine zufriedene Kundin hat dem Geschäft eine gute Bewertung gegeben.
A satisfied customer gave the store a good review.
saleswoman
'die Kundin' and 'die Verkäuferin' both belong to a shopping situation, but they are on different sides. The 'Kundin' wants to buy something or use a service. The 'Verkäuferin' works in the store, sells goods, and advises customers. The words can be confused because both people are often in the same place and speak with each other. A simple guide is: the 'Kundin' pays; the 'Verkäuferin' sells.

Die Kundin fragt nach einer kleineren Größe.
The customer asks for a smaller size.
Die Verkäuferin zeigt der Kundin ein anderes Modell.
The saleswoman shows the customer another model.