The links schema is a global struct schema (meaning it's not attached to pages) that's used to classify links to other websites and webpages that are useful to Star Army members. It's used to populate the site's links section.
There is also a link_category schema which is solely used to populate the categories of links.
Columns in the links schema include:
Wes updates the link list using this page: Link List Management Page. You'll have to talk to Wes if you have a to suggest a link or update a link.