Pingback between my Websited

I would like to figure out what pingbacks are. I have a read what seems like a gazillion articles on trackbacks and pingbacks and can't seem to find the nugget of information that puts this all together. Like how to I pingback to a site if there is no link. I read somewhere that you can just put a link to a post in your text like this "MIY CERAMICS BLOG" and maybe it will automatically pingback?