Ignition Gazebo is the latest generation of Gazebo, a simulator that is widely popular with ROS users. Gazebo was rearchitected to provide a complete toolbox of modular development libraries which makes simulation more powerful and easy. With a second LTS release, Ignition is ready to be adopted by the ROS community, whether migrating from previous versions or starting from scratch. This talk will introduce the components of the simulator, cover application areas, and highlight features that are crucial to the ROS community. The talk will also cover ROS integration best practices so that developers can incorporate simulation in their workflows.