A face-to-face interview is a foundational qualitative research method in which a trained moderator conducts a live, in-person conversation with a participant to explore perceptions, motivations, and experiences in depth. Within qualitative research, this format is prized for its ability to capture nonverbal signals, including body language, facial expressions, and emotional reactions, that enrich the interpretation of verbal responses. Face-to-face interviews are commonly used in concept testing, brand research, usability studies, and ethnographic work where physical context matters. However, the method carries significant operational costs: recruiting, scheduling, travel, and moderation all extend timelines and limit the number of participants a team can realistically reach within a given budget or project window.