Unity provides several post-processing capabilities that allow you to both intercept and override and also add your own processing to just about anything in the Asset pipeline, anything from assets, scripts, and even the build process itself.
Post- or pre-processing of assets is very useful if you have custom-made or complex assets that need additional work once they are imported in Unity. In most cases, this is not needed as Unity does a lot of work for you by processing assets already.
Note
If you do create any asset-processing scripts, remember they need to be placed in Assets\Editor.
We won't go into too much detail here as it is a very large area; this section is mainly to highlight its existence for those who were not aware. It is well-worth reading and checking up on.
Tip
For more information about asset processing, refer to the Unity scripting reference guide at https://docs.unity3d.com/Documentation/ScriptReference/AssetPostprocessor.html.
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