The phrase refers to the process of ending an active user session on the Netflix streaming service. This action severs the connection between a specific device and a particular Netflix account. For example, if a user has been watching Netflix on a shared computer, completing this procedure prevents subsequent users of that computer from accessing the account.
Properly executing this action is important for maintaining account security and privacy. It prevents unauthorized access to viewing history, personal information, and subscription details. This is particularly relevant in shared environments, such as public computers, borrowed devices, or households with multiple users. Furthermore, logging off inactive devices frees up available device slots on the Netflix account, allowing the account to be used on other devices.