M S N Messages

[mal-ahawii]

I am still finding my way around the computer system, and i keep getting a flashing icon in the right corner of my screen, flashing M S M messaging service, could someone please tell me, what this service is, and do you have to subscribe to it.
"Thank You" you all in advance.

[kgmrush]

this tells you what it is
http://webmessenger.msn.com/