Real-time web applications are apps that enable interactive usage by users, systems, or applications. They operate within a time frame of under a second, or even a millisecond, enabling users to get information as soon as they ask for it. This means that users do not have to check on the information themselves or rely on software to check periodically for updates.

Real-time web applications can be things like instant messaging, gaming, status updates, alerts, and dashboards. The term real-time is often debated

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