Wikipedia:Userspace

User pages are for communication and collaboration. While considerable leeway is allowed in personalizing and managing your user pages, they are community project pages, not a personal website, blog, or social networking medium. They should be used to better participate in the community, and not used to excess for unrelated purposes nor to bring the project into disrepute.

Clicking on the backlink will bring you to your User page. But, contrary to what you might expect, no new tab has been created for "subpages", for example, containing a list of all of your subpages; everything on your User page is unchanged. So how do you navigate to your subpage? As a method of last resort, you can always go back to your subpage by adding the title of your subpage to the url of your User page:

There is, of course, an easier method, but it has to be done manually. Copy and modify the following text and put it on your User page:

You will be notified when someone else edits your user talk page. Since 30 April 2013, registered users receive a notification through the new system (see image right); unregistered users still receive notifications with the old-style Orange Bar. Registered users wishing to add back the functionality of the Orange Bar notification may do so through this script.

For users not editing with an account (unregistered users), the alert below is automatically displayed on all pages until you view your user talk page. If you click "new messages" it will direct you to the bottom of your talk page. If you click "last change" it will show you the last edit done to your talk page. Creating a fake message banner that misleads readers into thinking they have new messages is prohibited.

The links and are shortcuts that take any user to their own user and user talk pages. If someone is to visit your (or someone else's) user or user talk pages a proper page link will be needed (e.g., [[User talk:Example]]). In practice, user and user talk pages are mostly visited by clicking on user signatures in discussions, and links shown in page histories and diffs.

There is no fixed use for user pages, except that usually one's user page has something about oneself, and one's talk page is used for messaging. Provided other users can quickly and easily find the pages they need, users may, within reason, freely organize their user pages as they choose.

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Wikipedia