The User Library in Twinmotion allows you to save assets in your library that can be used in various projects. This is a great way to improve efficiency and have easy access to your favorite assets. See videos below for tips for working with the User Library.
https://dev.epicgames.com/community/learning/tutorials/WzYX/unreal-engine-user-library-tips-in-twinmotion-twinmotion-tips-tricks