Core Insights - Meta introduces a nickname feature for Facebook Groups, allowing users to post under custom usernames while maintaining privacy, marking a shift from its traditional "real name" policy [2][3][4] Group 1: Feature Overview - The nickname feature enables users to participate in groups more personally while protecting their privacy, similar to platforms like Reddit and Discord [2][4] - Users can customize their nicknames, which must comply with Facebook's Community Standards and cannot duplicate existing group member names [5][10] - The feature allows users to hide their main profile and photo from group members, although group admins and Facebook's systems will still have access [4][12] Group 2: User Interaction - Users can switch to using a nickname when creating a post, with the option to revert to their real name at any time [7][10] - Nickname changes are limited to once every two days, and past posts will reflect the new nickname, although updates may take time to synchronize across devices [10][12] - Users with nicknames will not have access to certain features like Live Video and private messaging [12]