Step 1: Where middle managers sit.
Middle level management, department heads, regional managers and similar positions, sits between the top management that sets broad direction and the supervisory staff that executes daily work, so their functions naturally connect the two levels.
Step 2: They interpret top management policies.
When top management sets a broad target, say a twenty percent rise in sales, middle managers translate that into department level plans and explain it in terms lower staff can act upon.
Step 3: They organise and direct lower level activities.
Middle managers assign tasks to the supervisory staff under them and guide the day to day working of their department so it stays aligned with the interpreted plan.
Step 4: They coordinate across departments and develop staff.
They also cooperate with other departmental heads so that work does not clash, and they recommend training or hiring of lower level staff to keep their team capable. All of this makes middle management the working link that turns top level strategy into ground level action.