Pak Creator is a plugin that can be used in the Unreal Editor for creating .pak files. The plugin creates an independent .pak file out of content plugins. This is useful if you would like to distribute content to users or customers. For example for game modding or in the architectural industry.
This is a convenience tool if you would like to not use Unreal project launcher.
This tool only creates .pak files. To load and use the pak file you must use the engine's pak functions or use the PakLoader plugin.