Rollout scope is the set of users, devices, or regions that receive a new feature or security update. A rollout may cover everyone at once, or expand gradually across selected groups, device models, or locations.
In cybersecurity, scope affects how broadly a defense protects people and where gaps may remain. For example, an anti-scam feature in a messaging app may initially be available only on certain devices or to a subset of users. Security teams should check which systems are covered, monitor staged deployments, and avoid assuming that an announced feature is already available to everyone.