Remote Browser Isolation is a security model that opens web pages in a remote, managed environment and sends the user only the rendered result, such as images and text. The web content does not run directly on the local device, which helps keep active scripts, exploits, and hostile downloads away from the endpoint.
RBI matters because the browser is a common attack path for phishing, drive-by malware, and browser zero-days. In defense, organizations route risky sites or unknown links through isolation to reduce exposure and shrink the blast radius of a bad click. Its effectiveness depends on policy and design: allowing downloads, copy-paste, or printing can reintroduce risk, so strong deployments tightly control what users can do inside the session.