Replying to a Message

I noticed the last 2 messages that I posted have EDIT beside the message. What does that mean? Am I doing something wrong?

heya…

you are doing nothing wrong at all. for each any every one of us, we can edit any message of which WE are the author. this allows you to fix typos, or change your wording, et cetera. a handy feature if you have a fit of pique that you later regret! :) so please keep posting! just know that you can modify it later (and make all those people who reply look like twits! :) )

pretty sure I'm a twit!

Tanks! Just didn't want to be a twit!!!