In this Unreal Engine 5.3 Niagara tutorial, we break down Emitter Scalability & State Management options. Learn how to optimize your particle systems, set up distance culling, manage particle sleep/kill states, and improve scene performance using visibility culling! 
https://dev.epicgames.com/community/learning/tutorials/l0r1R/unreal-engine-ue5-niagara-fundamentals-emitter-update-state-management-scalability-9