In English, it's 'customer service'.

It's a bit of a vague question, what do we think in terms of what? Attitude, apparence etc?

Depende de la situación. It depends on the situation. Customer service always includes: Courtesy towards the customer Listening to the customer´s concern about a product (problem, wishes, etc) Friendly attitude Knowledge of the product you are selling Of course, there are many more, but this might be a beginning. Oh, and ¨keep smiling¨

I ask this because i would like to know another word to answer this kind of question in a job interview real