pingbacks (?)

Hi, i have a blog where i use wordpress. I’m trying ot figure out how to do pingbacks (at least I think that’s what they are or is it trackback?)… when I want to post about something but it is in reference to someone’s else’s blogpost… i want to post on my blog but notify them/or credit them whatever.

i can’t figure out in my dashboard how this is done….
(must be basic, but…)