GPU is one of the main possible bottlenecks from game development, in Unreal where graphics quality is #1 focus making it optimized can be a challenge if you do not look in the right spots. This article presents ways to keep your eyes open to how your GPU is handling your game and how to make sure you have best configurations, options and techniques applied to make your game run smooth in all platforms. Using RenderDoc to analyse your games frame by frame and Unreal optimization pipeline to finetune all visual game aspects.
https://dev.epicgames.com/community/learning/tutorials/KxXX/unreal-engine-optimization-toolbox-gpu-optimization-and-renderdoc