Steering geometry is the arrangement of the front wheels and steering-axis angles to provide easy steering, stability, smooth cornering and minimum tyre wear.
Camber → Wheel inclination from vertical → Tyre contact & wear
Caster → Steering-axis inclination in side view → Directional stability & self-centering
Kingpin Inclination (KPI) → Steering-axis inclination in front view → Reduces steering effort
Toe-in / Toe-out → Wheel alignment in top view → Straight-line stability & tyre wear
Ackermann geometry → Inner wheel turns more than outer wheel → Smooth cornering & less tyre slip