UX KPIs (Key Performance Indicators) are metrics that product development teams collect and analyze to measure the success of their design activities in a quantitative manner. They turn various data about the users’ behavior and interaction with the UI into digestible information for the teams to draw conclusions and make decisions. Tracked over time, they indicate how close the developers have come to achieving the set design goals.
The Net Promoter Score, bounce rate, and returning users rate are prominent UX design KPI examples.