Token renewal<\/strong>: After the Access Token has expired, the client can use the Refresh Token to obtain a new Access Token without further user interaction. This is done by a request to the Authorization Server, which validates the Refresh Token and issues a new Access Token (and sometimes also a new Refresh Token) if successful.<\/li>\n<\/ol>\nThis fine-grained mechanism of OAuth 2.0 makes it possible to minimize user interactions by reducing the need for frequent re-authentication. At the same time, it increases security, as access tokens that may have been intercepted are only valid for a short time. Refresh tokens therefore make a significant contribution to the user-friendliness and security of authentication systems by offering a balance between convenient access and necessary security measures.<\/p>\n<\/div>