This is everything the Vault currently recognizes. When a new recording or note comes in, the Vault checks this list first, so a person, account, product, event, or named play gets linked to the right record instead of floating loose. The list rebuilds every day from the strategy page, the account and product libraries, the glossary, and the corrections you've taught it. If something you expected is missing, that's why a link got missed: teach it once (link the item by hand on the Home feed, or just tell Claude) and it's covered from then on.