Webmaster Tools question
This is a screenshot of the page I am curious about.

What do the 'impressions' and 'displaying' numbers mean? They seem like they are the same thing, but they are different, and that is what confuses me. Can someone explain it too me? Any other thoughts are welcome too. Seems like I need to get better subject lines and descriptions to increase my clicks, but I am not sure.
Tim Pears
Tim Pears