What does "AdditionalCoreIncludeDirs" and "OverrideStarterScript" do and how it works

So I was seeing properties of “GameSettings (service)” that are located in roblox studio in file.settings …, but I came across 2 properties that I don’t know that are: “AdditionalCoreIncludeDirs” and “OverrideStarterScript”.
I went to see it on the wiki and the only thing I realized was that it would be related to my pc’s directories, however for me it is vague and I still haven’t figured out why I should use these 2 properties. Any use for using these 2 properties?