This is the official manual for the latest Org-mode release.
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 will be displayed through
org-agenda-tags-column. You can
also customize the prefix using the option
This prefix is followed by a cleaned-up version of the outline headline
associated with the item.