Hit counts measures the number of requests sent for a file to the server.
This is a dated and largely unhelpful metric because every request for any file is counted. Although it sounds useful, actually it gives you little actionable information. If you have a page containing four images, one request for that page is counted as five hits. To increase your hits, you can add images to the page!
Due to the misleading nature of the metric, few people use it seriously, and the term “Hits” is often incorrectly used in conversation and the media when what they actually mean is to describe traffic in general, or specifically visits or page views.
– Excerpt from the book ProBlooger