Measuring a product launch shows if marketing efforts actually worked. This starts by tracking simple things like website visits, email signups, and sales numbers. These numbers show interest and action, not just noise. Social media comments and messages also give clues about public reaction. Comparing results to goals helps judge success clearly. It is important to review data over time, not one day only. Small lessons from results can improve future launches. Customer feedback also explains numbers and points to improvements for later campaigns online. What metrics do you think matter most when checking launch success in digital marketing?