Plain English Meaning
Steerage commands are the on-screen cues that show the pilot which way to pitch and bank the aircraft to follow the path the flight director has worked out. The pilot just flies the aircraft to match those cues.
Full Definition
In a Flight Director System, steerage commands are the visual pitch and bank guidance signals computed by the flight director and displayed on the attitude indicator (typically as command bars or a single-cue 'V-bar') that tell the pilot exactly how to fly the aircraft to capture and hold a selected flight path, such as a heading, course, altitude, or glideslope.
Context Anchor
Seen when using a flight director system, especially on an that gives guidance for heading, course, altitude, or an .