The name breaks down as follows:

When you run this installer, it does not install the Unreal Engine editor itself. Instead, it checks your system for missing runtime components and automatically fetches and installs them. In essence, it is an “all‑in‑one” dependency installer that makes sure every UE4 game or application can run without having to manually hunt down dozens of separate redistributable packages.

: Click Finish once the process concludes. Restart your computer to initialize the new system drivers and libraries. Troubleshooting Common Installation Errors