# Campaign Trackers

You can use one or more tracker URLs in your campaign emails to track the response to your campaign. When recipients open the email and click on a URL link, the system, using an unique key identifier, track actions by each recipient.

To create a campaign tracker, enter the following information:

- Tracker Name. Enter a tracker name for your reference; use alpha-numeric characters.
- Tracker URL. Enter the tracker URL; for example, http://www.sugarcrm.com.
- Opt-out Link Select this box to embed your "Unsubscribe" instructions in a tracker URL. By default, the system uses the removeme.php file which contains these instructions, and displays this file name in the Tracker URL field.