Steam Library Sharing is a feature that allows you to share your Steam game library with other users. This can be useful if you have friends or family members who want to play the same games as you, but don’t want to purchase them separately.
To share your Steam library, you must first enable the feature in your account settings. Once you have done this, you can then invite other users to access your library. They will need to have a Steam account and be on your friends list in order to accept your invitation.