What does the 'Back to My Mac' feature allow users to do?

The 'Back to My Mac' feature allows users to access and control their Mac remotely. This functionality was designed for users who may need to reach their home or office Mac from another location. By using this feature, you can log into your Mac from another Apple device and access files, applications, and even control the system as if you were sitting in front of it. This capability is particularly useful for those who need to retrieve important documents, manage settings, or run applications while they are away from their primary Mac.

The other options explore different functionalities. For instance, making calls through a Mac usually involves other features like FaceTime or specific VoIP applications, which are not the main intent of 'Back to My Mac.' Similarly, backing up data to a secure cloud refers to services like iCloud or other backup solutions, which focus on data storage rather than remote access. Optimizing system storage automatically pertains to system maintenance features that help manage storage effectively, but this does not relate to the remote access capabilities that 'Back to My Mac' provides.