A server call, also known as a "hit" or an "image request", is an instance in which data is sent to Adobe servers to process. The most common type of server call is a page view. A page view is where a visitor views a page on your website and a server call is generated to Adobe, where information is collected, processed, and then included in your report metrics. There are other types of server calls, including exit links and file downloads, where data is sent to Adobe to process, but is not recorded as a new page view. Even "excluded" page views (excluded from your reports by an IP address range you configure, for example) are server calls because they are received and processed by Adobe but never show up in your reports.