Secure the pulley to a stable surface at the point where the rope that will be riven through it---reeving is the name for the process of rigging rope through a pulley---needs to change direction.
Insert the end of the rope between the wheel and the frame of the pulley. The rope should rest on the sheave---the wheel of the pulley---rather than the frame.
Continue pulling the rope through the pulley and toward its destination---the object to be moved, or the object to which the rope is to be secured.
- The hook or ring atop the pulley can be tied in place or attached to a permanent mounting fixture.