The purpose of this question is to understand the communication skills you would bring to the Pinterest Software Engineering team. Throughout the interview, the hiring manager will seek to understand some of the soft skills pertaining to this job. These include communication, teamwork, conflict resolution, and others. Every time you answer a question, you are being evaluated for both your experience and skills, as well as your ability to communicate. This question relates directly to this objective. As you answer, this question gives you the opportunity to explain a complicated process to someone with little technical knowledge. Your interviewer will be looking to hear that you can do this effectively.