`msvcp120.dll` is a Dynamic Link Library (DLL) file provided by Microsoft as a part of the Microsoft Visual Studio software suite. Specifically, this file is associated with the Microsoft Visual Studio 2013 version. The DLL is a component of the Microsoft C Runtime Library and is crucial for running programs developed using Visual Studio 2013 in C++. The "msvcp" in the filename indicates that it's related to the Microsoft Visual C++ runtime. The "120" signifies its association with Visual Studio 2013. DLL files like `msvcp120.dll` contain code, data, and resources that multiple programs can use simultaneously. In the context of the C Runtime Library, this DLL provides standard C++ library functions that developers utilize in their applications.

For users who have software on their systems developed with Visual Studio 2013, this DLL is essential for the smooth operation of that software. If the file is missing, corrupted, or incompatible, users might experience error messages, software crashes, or other unexpected behaviors when trying to run or install certain applications. In situations where there are problems related to `msvcp120.dll`, a common solution is to reinstall the Microsoft Visual C++ 2013 Redistributable package, which provides the necessary runtime components for running C++ applications built with Visual Studio 2013.