---
title: "Event Source Tracking Parameter"
slug: "event-source-tracking-parameter"
updated: 2020-04-16T20:31:32Z
published: 2020-04-16T20:31:32Z
canonical: "onpremises.webtrends.help/event-source-tracking-parameter"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://onpremises.webtrends.help/llms.txt
> Use this file to discover all available pages before exploring further.

# Event Source Tracking Parameter

#### WT.es

`WT.es=hostname/page`

This parameter permits tracking click-based events and the source page from which they originated. The JavaScript tag forms this parameter by concatenating the `dcssip` and `dcsuri` parameters. to determine what page a user was on when an "event" occurred. For example, when a user clicks on a link, the event source shows what page the user was viewing when the click occurred. Although in the case of a page view, these URLs are identical, in the case of a click the dcsuri is actually the "destination URL" of the click, while the event source is the "source URL" of the click.