How would you estimate the market size for a new mobile application targeting fitness enthusiasts?

This question is commonly asked in interviews to assess a candidate's analytical thinking, problem-solving skills, and understanding of market dynamics. Interviewers want to see how you approach complex problems and break them down into manageable components. They look for structured thinking, the ability to use data and make assumptions, and how you communicate your thought process. A common misconception is that candidates should provide an exact number; however, it's more about the reasoning and methodology behind your estimates. This question has real-world applications in business strategy, product development, and marketing, as understanding market size is crucial for making informed business decisions. By articulating your thought process clearly, you demonstrate your analytical capabilities and strategic mindset, which are essential for roles in product management, marketing, and business development. Overall, this question tests both quantitative skill and qualitative reasoning.