Digital asset management (DAM) is the activity of actively curating and managing digital assets. Normally associated with Photography and video, DAM extends to music, ebooks, and other sets of files.
A core function of Digital asset management is the curation of Digital asset metadata.
I use IMatch for photos and videos, Calibre for ebooks, Plex and Jellyfin for video and Zotero for other documents. It can be difficult Organising digital knowledge across multiple systems.