There is some information on how to interpret this information (and get further information) here: GPU Profiling | Unreal Engine Documentation
You can also use stat scenerendering to see your drawcalls. If you’re seeing a high number here, that could be your problem (‘high is relative’, but for the game you describe 1000+ might be considered high)
Finding out what is causing high GPU demands isn’t easy without seeing the game. It could be many things but I’d suggest making sure your textures are sensible (i.e. not huge and probably should be power of 2), making sure that the shaders your using are also sensible (don’t contain loads of material instances or expensive operations - as mentioned above, pressing F5 to see shader complexity will help with this). You should probably check that you’re lighting is sensible too - you don’t want loads of realtime lighting.