Before displaying items in an agenda view, Org mode visually prepares
the items and sorts them. Each item occupies a single line. The line
starts with a prefix that contains the category (see Categories)
of the item and other important information. You can customize in
which column tags are displayed through
can also customize the prefix using the option
org-agenda-prefix-format. This prefix is followed by a cleaned-up
version of the outline headline associated with the item.