Place ads you want to test in an ad set. You can set up any number of ads as long as they are on pause. The rule will unpause three random ads with the lowest number of impressions.

When an ad reaches 8000 impressions, the rule will pause it. If the metrics are good—a trophy will be added to the ad's name.

The rules in this strategy will be applied to all ad sets that have 'Creative test' in their names. You can change this settings in filters in the 'Rule applies to' settings.