A personal home page can be used to publish data about yourself, such as:
who you are, what you do, what you like or dislike
your phone number, email address or other contact information
a photo of yourself
You also can use a personal home page to store information for yourself (and maybe also for others), such as:
your favourite links
your todo list
your notes
Keep in mind that a personal home page is usually public, anyone can read and edit it (and this is a good thing, see it as a means of communication with you). However, you can create protected sub-pages to restrict public access to some of your pages.