There are special properties (Frontmatter/YAML/Metadata) that has a function within Structured Tree. These are the default keys. All keys can be changed in the settings

• id - A unique 23 character long, alphanumeric ID for notes
• title - Will be displayed in the tree as the name of the note, and will show up while searching with the Lookup modal
• desc - Will show up in the Lookup modal alongside title
• created - The created date of the note