Request of a file from a Web server.
The term “hit” is perhaps the most misused term in online marketing, mistakenly used to mean unique visitors, visits, page views, or all of the above.
A hit is merely a request for a file from a Web server. A request for a Web page counts as a hit, but so does a request for a graphic on a Web page. Since the number of graphics per page can vary considerably, hits mean very little for comparison purposes.
Don’t use the term “hit” unless you really mean it. ;-)