Which of the following is a key takeaway from the course?

Balancing Customer Acquisition Cost (CAC) and Customer Lifetime Value (LTV) is crucial because it directly impacts a business's profitability and long-term viability. Sustainable growth means acquiring customers at a cost that is significantly less than the revenue they will generate over their lifetime. If CAC exceeds LTV, the business will lose money on every customer, making growth unsustainable. While customer satisfaction is important, it's a component of LTV (satisfied customers tend to stay longer and spend more), not the sole key to sustainable growth. Expanding into unrelated product categories can be risky and often dilutes focus, making it an unlikely "best way to scale." Focusing solely on revenue and profits without considering the underlying unit economics (like CAC and LTV) can lead to growth that is not profitable or scalable.