It is a sector generater shader. We can customize a sector shape by parameters.
Here are some example:
Glow Effect
Glow Effect 2
Glow Effect 3 (It's more frequency Sector)
Example 3, used Gradient Texture
Smoke Effect (Can be animated)
Smoke Effect 2
Asset Store Page:
https://assetstore.unity.com/packages/vfx/shaders/sector-glow-effect-generator-231547