Here are some of the benefits you get:

• You don't have to worry about meshes losing their volume while you relax them.
• You get a nice evenly distributed quad mesh.
• You can be happy about a nice smooth mesh.

Situations in which you would want to use TopoRelax:

• When you want to have an evenly distributed quad mesh for sculpting.
• When you want to produce morph targets.
• When you want to smooth out a mesh to remove unwanted artifacts.

Home Page - https://mariussilaghi.com/products/toporelax