A qualitative research method. It often involves passive observation. Initially, the interviewer visits the respondent at home, then they go shopping together in the stores most frequently visited by the respondent. After that, the respondent returns home to continue the discussion and observation.

This method can be applied in various retail environments and may include accompaniment to places such as pubs, bars, clubs, and sports centers. It is used to identify behavioral aspects that respondents are not always willing to disclose publicly.