The options dialog will allow you to configure a number of different areas of KOrganizer.
The personal options relate to your personal identity, and other miscellaneous things that don't fall under any of the other general categories.
Refers to your full name.
Your email address, which will be used both to identify appointments and events which belong to you, and for group scheduling, so others know what address to send appointments to.
Additional information about yourself. Currently this field is unused, so you may safely ignore it.