Event-Based Rules are often used to fire an s.tl() (non-page view) Analytics beacon when the user clicks an element on the page, such as a link that takes the user to a partner site.
The above link has the following code:
<a href="http://www.adobe.com" class="partnerExit">This is an example link.</a>
I could configure DTM to listen to this click by setting up my rule to listen for any click to a link (an "a" tag) with a class of "partnerExit":

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