Improvisation techniques form the backbone of spontaneous acting, fostering creativity and quick thinking. Actors learn to create scenes, characters, and dialogue on the spot, developing essential skills like listening, reacting genuinely, and adapting to unexpected challenges. Key principles include the "Yes, And..." rule, making strong choices, and focusing on the present moment. Warm-ups, exercises, and games help actors build trust, collaboration, and confidence. Advanced techniques explore long-form improv and applying these skills to scripted acting.