Imported Note

I am new here on the message board. While clicking around on my profile information I came across something called an Imported Note and another phrase Imported User. What are these?
David

Hi, David. We're not sure what that is, but are guessing it's some kind of remnant of the import from the one forum to this one. We checked your account and don't see anything unusual other than what you pointed out. Don't think it's anything wrong, but we'll make a note of it in case we see again.

Thanks for the rapid answer and your help!
David