Here are nine key performance indicators (KPIs) that are relevant to UX (user experience) design:
User satisfaction: measures the level of satisfaction users have with the product or service, typically through surveys or rating systems.
Task completion rate: measures the percentage of users who are able to complete a specific task successfully on the website or application.
Bounce rate: measures the percentage of visitors who leave the website after only viewing one page.
Time on site: measures the amount of time users spend on the website or application.
Click-through rate: measures the number of clicks on a specific link or call-to-action compared to the number of times it was displayed.
Scroll depth: measures the extent to which users scroll down a page and engage with the content.
Error rate: measures the number of errors or mistakes made by users while using the website or application.
Return visits: measures the number of users who return to the website or application after their first visit.
A/B testing results: measures the effectiveness of different design elements and layouts by comparing the results of two or more variations of the same page.
These KPIs can provide valuable insights into the performance and effectiveness of a UX design and help inform future design decisions.