What KPIs define success in website designing (clarity, engagement, trust, conversion)?

KPIs for website design success span four outcome categories. Clarity is measured by time-on-page relative to content depth and task completion rates in usability testing. Engagement is tracked through scroll depth, pages per session, and return visit rate in Google Analytics 4.

Trust is assessed through qualitative user research and indirectly through metrics like direct traffic growth and low form abandonment rates. Conversion is measured by goal completion rate, CTA click-through rate, and lead-to-customer ratio when CRM data is connected. The strongest design teams set baseline measurements before a redesign and report on delta improvements at 30, 60, and 90 days post-launch, rather than treating launch day as the finish line.