Alexa is the world's leading public traffic-recording web site. If you claimed your ownership there, you can change your site's profile as you wish!
To verify, search alexa for your domain name, and go to "is this your web site ?"
Alexa will ask you to verify your ownership via any of the 4 methods.
1. Uploading text file.
2. Adding a metatag to home page.
3. Confirm e-mail address
4. Ask an officer.
1. Uploading the txt file.
Most builders don't offer direct access to the document root, so please skip to next method if you are unlucky to upload.
If you have the direct access, just upload the file using a FTP client or browser uploading.