Triggers is a feature that defines when the SleekBox will show. There are different ways to trigger your SleekBox*.
The first thing you'll obviously have to do is create a SleekBox that you would like to trigger. Or at least pick a SleekBox that you've already created and then edit it.
Next, go to the step 'Settings' and choose 'Add another trigger':
There are four different options:
*Note: SleekBars do not have triggers and will show right away.