If you see multiple identical entries for the same year and architecture (e.g., five entries for "Microsoft Visual C++ 2013 x86"), this is a result of different installers failing to detect existing versions. In this case, it is safe to uninstall the older versions and keep the one with the highest version number, or use a tool like the Microsoft Program Install and Uninstall Troubleshooter to clean up the registry duplicates.
When executed, the redistributable extracts and installs the following key files (typically to %SystemRoot%\System32 or %SystemRoot%\SysWOW64 depending on host architecture). vc2013redistx86
Target architecture
Silent install support
Side-by-side compatibility
Missing DLL fixes