Steam Library Sharing allows users to share their Steam game library with friends and family members. This can be useful for sharing games that you no longer play or for allowing others to try out games before they purchase them.
To share your Steam library, you must first enable Family Sharing. To do this, open the Steam client and click on the “Settings” menu. Then, select the “Family” tab and click on the “Authorize Library Sharing” button. You will then need to enter the Steam usernames of the people you want to share your library with.