How do you measure product quality?

Measuring product quality depends on the type of product and business goals, but generally includes several key metrics:

• User satisfaction (NPS, CSAT) — how satisfied users are with the product.
• Activity and engagement — usage frequency, time in the app, retention.
• Conversion and goal achievement — how well the product helps users accomplish their tasks.
• Technical quality of the product — number of bugs, stability, performance.

To assess quality, it is important to combine quantitative metrics with qualitative user feedback to understand not only "what" is happening but also "why".