On July 1, 2019 Apple plans to shut down its Back to My Mac service. This let users set up a network of Macs that could be accessed remotely.
Back to My Mac Ends With macOS Mojave
Back to My Mac was a remote desktop feature you could use to access your Mac’s hard drive on another device.
Screen Sharing Could Be a Thing in iOS 11
We don’t know how it will work yet, but have some speculation about the upcoming new feature.