Chrome's internal 0–100 per-domain user engagement metric, built from navigation events, input interactions, and media consumption, decaying over time when a site is not visited.
The Site Engagement Score is a per-origin metric computed by Chrome and stored locally in the browser. It measures how meaningfully a user interacts with a given domain over time, on a scale from 0 to 100. The score is not reported to any server — it lives only on the device — but it influences browser-side behaviours including notification permission decisions, Progressive Web App promotion, and content recommendations.
Chrome accumulates points from specific interaction events. A navigation to the site adds 1.5 points; user input (clicks, keystrokes) adds 0.6 points per event; visible media playing adds 0.06 points per interval; hidden media adds 0.01. The first engagement of each day with a site earns a 1.5-point bonus. A web app installed as a shortcut earns 5 points when launched. The score is capped at a maximum of 15 points per day and decays proportionally (by a factor of 0.984 per two-hour period) when the site is not visited, dropping below 0.5 triggers cleanup.
The Site Engagement Score is a transparent, non-keyword signal of how much a browser trusts and habitually uses a domain. Sites with high scores are more likely to receive notification permission grants, be promoted as Progressive Web Apps, and appear in browser-native recommendation surfaces. More broadly, it is a proxy for what traditional SEO calls branded demand and returning visitor behaviour — signals that are increasingly relevant as AI systems use on-device context to personalise their responses. Chrome's on-device AI models, including its on-device models, have access to engagement metadata when assembling context for the active page.
Any Chrome user can inspect per-domain engagement scores by navigating to chrome://site-engagement/. The scores are live and update in real time as the browser records interactions.
