In this tutorial, we dive into the Gravity Force module in Unreal Engine 5.3 Niagara! Learn how gravity affects your particle systems, how it relates to acceleration forces, and how coordinate spaces (World vs. Local) change particle behavior when rotating emitters. 
https://dev.epicgames.com/community/learning/tutorials/l0r3z/unreal-engine-ue5-3-niagara-fundamentals-gravity-force-episode-38