This is are Windows drivers for Samsung smartphones. The Samsung drivers are necessary when attempting to flash a Samsung device using Odin or for any development purposes like running ADB and Fastboot commands when USB Debugging is enabled.
What is provided here is a Windows executable file. Installation will be as simple as running the provided file and follow the installer guide. You may as well get Samsung Kies if so some reason (unlikely so) this file fails. The file here is extracted from Kies however.