When you want to gropu your routes without adding extra line to path make a catalog with ().
Catalogs with name lake this (name) will be skipped and paths will stay same.
If you have a catalog for extra code that will not contain any routing pages add _ on begining and next will know that is not for routing and will not search for page file
Parallel Routes allows you to simultaneously or conditionally render one or more pages within the same layout. They are useful for highly dynamic sections of an app, such as dashboards and feeds on social sites.
Add a folder with @ at begining and lod it like a children element
If you need do extra e. g. logging Use after method it will be performed after the response is send so user will not be hit with performence lose.