This Back to My Mac address is quite versatile and can be used for more than just accessing one Mac from another. If you have any system, be it an iOS device or Android phone; a Windows PC or Linux system that support SMB file sharing, SSH connections, Web connections, and others; then you can use this Back to My Mac address on these systems to point them to any of your configured Macs.
As a final note, while sharing services have their conveniences, unless you use them regularly you might consider keeping them disabled. While there are no known hacks for these services, and they are built off of reputable and secure coding, best practices are to keep services off that you don't intend to use.
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