You can perform a variety of package management tasks by using the Package Manager window.
Follow these tasks to manage asset packagesA collection of files and data from Unity projects, or elements of projects, which are compressed and stored in one file, similar to Zip files, with the .unitypackage extension. Asset packages are a handy way of sharing and re-using Unity projects and collections of assets. More info
See in Glossary. For information about managing UPM packagesA Package managed by the Unity Package Manager. Refer to Packages.
See in Glossary or feature setsA feature set is a collection of related packages that you can use to achieve specific results in the Unity Editor. You can manage feature sets directly in Unity’s Package Manager. More info
See in Glossary, refer to Add and remove UPM packages or feature sets.