Those are properties.
Properties can be used to organize your notes.

## Special Properties
Some properties have special meaning for Foam:
- the `title` property will assign the name to the note that you will see in the graph, regardless of the filename or the first heading (also see how to [[write-notes-in-foam]])
- the `type` property can be used to style notes differently in the graph (also see [[graph-visualization]])
- the `tags` property can be used to add tags to a note (see [[tags-and-tag-explorer]])