`msvcp140_2.dll` is a dynamic link library (DLL) that's part of the Microsoft® Visual Studio® development environment, specifically associated with the Microsoft® C Runtime Library. The Visual Studio suite is a powerful toolset used by developers to create, test, and deploy applications across a variety of platforms. This particular DLL file is one of several runtime libraries related to the Visual C++ component of Visual Studio. The "msvcp" portion in the filename typically indicates that it contains functions associated with the Microsoft C++ runtime, which provides necessary routines and operations for applications written in the C++ language. The "140" suggests that this DLL is related to Visual Studio 2015 or libraries linked with it, and the "_2" likely denotes a specific version or variant of this library.

Such DLL files are crucial for the correct operation of applications built with Visual Studio. When a developer creates an application, it might rely on a number of these runtime libraries. If these libraries are not present on a user's system or are missing, applications might not run correctly or might produce errors. Therefore, when deploying applications, developers often include necessary runtime libraries or use installers that ensure the right DLLs are available on the target system.