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Web 2.0 is characterized by the development of the internet from its original static content to dynamic and participatory content, and by the major role played by social media. The growing interest of health actors in using these new interfaces for information and communication is having a gradual but lasting impact on the practice of nephrology. These developments require nephrologists to understand the issues, rules, and risks associated with these digital tools. This article summarizes the main practical aspects of communication with patients and health professionals, and addresses the important issue of the digital identity of the care provider in the new field of connected nephrology.