What does it mean that I reset my BBID? How did I do this?

I was ment to reset my password on my BBID but it turns out i did a reset on BBID.. whats does this mean?..
How ever i tried to login using my email etc and its says the email does not exist.

If your email address is current and working for all else, it should work on the device with your password.
You may have to go to the BB site on your pc and do the reset there.

Here:
Changing your BlackBerry ID password, username, and other info - User Guide - BlackBerry ID