Product Metrics Glossary
Definitions, formulas, industry benchmarks, and measurement guides for the metrics that matter most to product teams.
Signup Conversion Rate
The percentage of visitors who complete the signup process.
New User Count
Total new registered users within the measurement window.
Activation Rate
Percentage of new users who complete the defined activation event within the onboarding window.
Time-to-First-Value (TTFV)
Average time from signup to the user's first key action or moment of value.
DAU/MAU Ratio
Daily active users divided by monthly active users — a measure of product stickiness.
Core Action Frequency
Average number of times a user performs the core product action per week.
Session Depth
Average number of meaningful actions per session.
D7 Retention
Percentage of users who return on Day 7 after their first use.
D30 Retention
Percentage of users who return on Day 30 after their first use.
Churn Rate
Percentage of active users who stop using the product within a given period.
Conversion to Paid Rate
Percentage of free users who convert to a paid plan.
ARPU (Average Revenue Per User)
Average revenue generated per active user.
Revenue per Feature
Incremental revenue directly attributable to a specific feature.
Viral Coefficient (K-factor)
Average number of new users each existing user brings through referrals.
Invite Conversion Rate
Percentage of invited users who successfully sign up.
Latency (P50/P99)
Page or API response time at the median (P50) and 99th percentile (P99).
Error Rate
Percentage of requests that result in errors.
Uptime Percentage
Percentage of time the system is available and operational.
Task Completion Rate
Percentage of users who complete a target task without error.
CSAT / NPS
Customer Satisfaction Score and Net Promoter Score — measures of user sentiment.
Time-on-Task
Average time a user takes to complete a specific task.
Feature Adoption Rate
Percentage of eligible users who have used a feature at least once.