Page Tagging

In this approach every page is tagged with a javascript which will notify a third-party server when a page is rendered by a web browser. Often the tags are a single snippet of code referencing a javascript. This type of technique is known as client-side data collection.
Page tagging can be performed in-house, but it is more often provided as a third-party service.Page tagging most often involves a monthly fee, although some vendors offer installable page tagging solutions with no additional page view costs.