systemd.scope — Scope unit configuration
scope.scope
Scope units are not configured via unit configuration files,
    but are only created programmatically using the bus interfaces of
    systemd. They are named similar to filenames. A unit whose name
    ends in ".scope" refers to a scope unit. Scopes
    units manage a set of system processes. Unlike service units, scope
    units manage externally created processes, and do not fork off
    processes on its own.
The main purpose of scope units is grouping worker processes of a system service for organization and for managing resources.
systemd-run --scope may
    be used to easily launch a command in a new scope unit from the
    command line.
See the New Control Group Interfaces for an introduction on how to make use of scope units from programs.
Unless DefaultDependencies=false
    is used, scope units will implicitly have dependencies of
    type Conflicts= and
    Before= on
    shutdown.target. These ensure
    that scope units are removed prior to system
    shutdown. Only scope units involved with early boot or
    late system shutdown should disable this option.