Session Score
CompositeA composite 0–100 score measuring whether sessions are deep and engaged or shallow and bouncy, derived from bounce rate, average duration, pages per session, and session-level frustration.
A composite analytics score, not an industry standard — defined as used by tools like UserActivity.ai.
Vanity Risk
Composite scores can mask offsetting changes — a site that improved bounce while frustration crept up may show flat session score even though the underlying experience changed materially. Always pull the breakdown before declaring a score stable.
What it measures
A single per-site score that absorbs the four signals most predictive of session health: how often visitors leave on page one (bounce, weighted heaviest), how long they stay (duration), how far they explore (pages per session), and how often they hit friction (frustration sessions). The penalty weights add up to 100 — a perfect score means none of the four failure modes are present at scale; a low score means at least one failure mode is dominant. Designed for at-a-glance health monitoring, not deep diagnosis: when the score drops, look at the breakdown to find which input regressed.
What to watch
- Score above 75: Most sessions are healthy by all four inputs. Use the breakdown to find the largest remaining penalty and decide whether the marginal effort is worth it — a 78 with a small bounce penalty is usually healthier than chasing 90.
- Score below 50: At least one input has collapsed. Look at the four penalties: a big bounce penalty points to landing-page or traffic-source problems; a big duration or depth penalty points to engagement or navigation; a big frustration penalty points to specific UX bugs. Fix the dominant penalty first — improvements compound through the composite.
- Score moving without an obvious cause: Composite scores can shift because one input changed dramatically while others held steady. Always pull the breakdown before reacting — a 10-point drop driven entirely by frustration is a different problem than the same drop driven by bounce.
In practice
A SaaS marketing site watched session score drop from 71 to 58 over two weeks with no obvious traffic shift. The breakdown showed bounce and duration penalties both rose ~6 points each. Tracing back, a recent A/B test on the homepage hero had been promoted to 100% — the new variant loaded a 1.4MB hero video that pushed first-paint past 4 seconds on mobile. Reverting the variant returned session score to 70 within three days. The composite caught the regression before any single page-level metric crossed an alarm threshold.
Illustrative scenario — a representative composite, not a specific company.
Related: Bounce Rate — heaviest weighted input (max 30 points of penalty).; Average Session Duration — second input (max 25 points of penalty).; Frustration Score — session-level frustration is the fourth input (max 20 points of penalty).; Engagement Score — overlapping composite that emphasizes return visits rather than depth-within-session.