1. A web site performance monitoring system comprising: a performance module configured to allow a user to utilize a graphical interface to define and associate performance operational rules with a web site, wherein the performance module includes a module configured to assign site metric attributes to a single pixel on a page within the website, the site metric attributes comprising marketing information; a storage device configured to store data representative of the performance operational rules; a monitoring module configured to assess the effectiveness of the website at achieving performance criteria defined by the performance operational rules, wherein the monitoring module transmits alerts in response to the website failing to achieve the performance criteria defined by the website performance operational rules; and a report module configured to generate reports on operational performance and to display site level pixel metrics from the single pixel.