Join Margarita Garcia Perez from IFT UAM-CSIC for the second part of a lecture series on Lattice Gauge Theory, presented as part of the "The Joy of..." weekly lecture series from the KITP Program: What is Particle Theory? (#particles25). This field-spanning program brings together diverse perspectives in particle theory, combining formal, computational, and phenomenological approaches to address central questions in particle physics. The lecture aims to drive theoretical progress and potentially uncover new questions for the particle theory community. The program focuses on uniting different methods and viewpoints to accelerate progress toward long-standing goals in the field of particle physics.