Key Performance Indicator (KPI)
A metric explicitly chosen to track progress toward a specific business or product goal. Not every metric is a KPI—only the ones tied to decisions you will actually make.
Definition: A metric explicitly chosen to track progress toward a specific business or product goal. Not every metric is a KPI—only the ones tied to decisions you will actually make.
A KPI is a metric you have deliberately selected to measure progress toward a defined goal. The word "key" matters—it means you have chosen this metric over others because it directly reflects whether you are succeeding.
What Makes a Good KPI
- Tied to a decision: If the KPI moves, you know what action to take. A KPI without a response plan is just a number on a dashboard
- Measurable and unambiguous: Everyone agrees on how it is calculated and what counts
- Leading, not just lagging: The best KPIs predict outcomes early enough to act. "Customer satisfaction" is lagging; "first-week feature adoption" is leading
- Limited in number: If everything is a KPI, nothing is. Three to five KPIs per product area is a practical ceiling
KPIs in UX Research
UX research helps validate whether product changes move the KPIs that matter:
- Task success rate tells you whether users can accomplish their goals
- Time on task tells you whether efficiency improved
- Conversion rate tells you whether the change drove business results
- NPS or SUS scores tell you whether perceived experience shifted
The Dashboard Trap
Teams often track dozens of metrics and call them all KPIs. When everything is "key," you end up with dashboards full of numbers and no clarity about what is actually working. Pick the metrics that will change your behavior, and ignore the rest.
Related Terms
Conversion Rate
The percentage of users who complete a desired action (e.g., purchase, sign-up) out of the total number of visitors.
ROI (Return on Investment)
A financial metric that measures the profitability of an investment relative to its cost, expressed as a percentage.
Analytics
The systematic collection and analysis of user behavior data from digital products. Tells you what is happening at scale but never why it is happening.