To address a 15% decline in active users, my first step would be to examine the data by segments. For example, is this decline consistent across all demographics, or is it more significant in specific regions or age groups? This examination could help determine if certain demographics are facing unique challenges or if targeted marketing efforts by competitors are influencing the situation. Additionally, it would be valuable to analyze the change in users based on the devices they are using. If the decrease is mainly among mobile users, it may indicate a usability problem on mobile screens following a recent app update. Moreover, content plays a crucial role for a platform like Disney+. Are there fewer new releases, or have popular titles been taken down recently? Evaluating the timeline of content additions and removals could provide insights into this issue. Lastly, seasonality could also be a contributing factor. Are we currently in a typical low period, or is there a significant external event, such as a major sporting event, that might be affecting user engagement? Analyzing historical data could help clarify this.