A customer's reluctance or willingness to recommend a product is an excellent indicator of the quality of the company's service and the product itself. Therefore, it is appropriate to ask this question only in customer surveys.
Here's an example from Droplr:
customer survey questions
Source
In this survey, customers can rate how likely they are to recommend Droplr on a scale of 0 to 10. To help customers determine what these values mean, qualitative labels have been added to the rcs data uk beginning and end of the scale — “not at all likely” and “extremely likely.”
To optimize your data, ask a detailed question like, “What would you tell someone who asked about us?” This will give you insight into what the customer loves or hates about your brand. So, if a customer says they’ll tell their friends that your customer service isn’t good enough, you can focus on training your team and giving them the tools they need to improve your company’s customer service . For example.
It is most effective to send this customer survey question approximately two weeks to one month after the purchase date. Give customers time to experience your product and service before analyzing the results.
You don't always need to focus on returning users with your profile.
You can also ask the same survey question to new customers. This will give you insight into people's first impressions of your product or service.