When to use Aileron & Rudder trim knobs?

Hallo there!
I'm flying the Baron and I'm wondering when to use the Aileron trim and the Rudder trim.
I've noticed that when I'm clicking the Aileron trim Knob the aircraft start turning.
Would be very grateful if someone could explain the concept behind these knobs..
I'm flying the Baron and I'm wondering when to use the Aileron trim and the Rudder trim.
I've noticed that when I'm clicking the Aileron trim Knob the aircraft start turning.
Would be very grateful if someone could explain the concept behind these knobs..