I often hear the term "meta effect" on many meta SE sites. What is the meta effect? I have Googled it but can't find anything about it on any meta site.
It is the effect of mentioning a post from another site on a meta-site. This draws more attention to the post you link from the meta-site's audience, resulting in more views than you'd get from the host site's audience alone, and often more votes. Whether those votes are up or down will depend on the quality of the post, of course...but either way, that's the "meta effect".