For x64 systems, this package specifically provides the 64-bit versions of those runtime files.
Microsoft unified the runtime for these three versions (2015, 2017, 2019) because they share the same binary compatibility. This means that a program built with Visual Studio 2015 can use the runtime libraries installed by the 2019 package, and vice versa. microsoft visual c 2015 19 redistributable package x64
Best Practices and Recommendations