What is my "Universal Handle" and why does it have a suffix?

When creating your Social Identity, it's important to have a name that's easy to read and follows you to other apps that support the Social Web so that you can effortlessly navigate across apps, find connections easily, and conveniently have others find you. We automatically append the suffix behind it so all users can claim the handle they want without having to append digits or characters to make their handle unique.

This action of having a universal handle cannot be undone nor can the numbers be removed.