What is a Package Manager in programming?

Unity packages are a handy way of sharing and re-using Unity projects and collections of assets ; Unity Standard Assets and items on the Unity Asset Store are supplied in packages, for example.

UNITYPACKAGE is a compressed package created by Unity, a 3D game development application . It contains project asset and library files used for building a game, for transferring project files from one project to another, and it may be included in new Unity projects to create a starting point for developing a game.

A package manager keeps track of what software is installed on your computer, and allows you to easily install new software, upgrade software to newer versions, or remove software that you previously installed .