So. I'm not as knowledgable as I thought...

Speaking in terms of site traffic -

Hits: The number of items requested from a web page. If a page has 20 images on it it will say it has 21 hits - 1 for the html page itself + the 20 images. Many people think 21 hits means 21 visits to that page, as I admittedly did!

Hm. You know, they say you learn something new everyday :)