How many way i can smooth my Mesh? This is my mesh





I have already smooth it but i would like to create a smoother surface in several points like these (reduce these angles)



Is there a way to achieve this goal without moving eache vertex from myself? I know that i can smooth face/edge when i export it in fbx but isn't enought; are there other ways?

Thank you
There are several tools you can use to smooth out edge loops.


Use the Smooth Vertex tool (Ctrl + V, Smooth Vertex).
Use the Relax tool (W, Relax).
Use the Curve and/or Relax tools from the LoopTools addon that comes
with Blender.
Use proportional editing (O).
Use a Smooth or Laplacian Smooth modifier.
Use a Subdivision Surface modifier (this will add new geometry to the mesh).