Isaac Sim is a comprehensive robotics simulation platform built on NVIDIA Omniverse that enables developers to create, train, and test AI-powered robots in physically realistic virtual environments. It provides GPU-accelerated physics simulation, RTX-based multi-sensor rendering, and end-to-end workflows including synthetic data generation and reinforcement learning for policy training. The platform supports importing robots from URDF and MJCF formats, integrates with ROS, and serves as infrastructure for robotics development across training and deployment stages.