Tien Nguyen completed an internship at The Nielsen Company where they conducted store audits by finding stores, communicating with owners, and auditing product presence. Some challenges included finding incorrect store addresses and owners' lack of trust in the new sales team. Tien overcame these by actively searching for stores, showing understanding of owners' needs, and explaining the audit process. Through the internship, Tien learned about Nielsen's integrated systems and roles of different departments in collecting and analyzing retail data. An evaluation found improvement over three rounds, with enthusiasm highest when tasks were going well.