SpotEffects provides the ability to run A/B tests on ads that can be viewed on-demand. This can be a powerful way to measure the impact of an ad without the need for a live audience. It has a robust API that makes it easy to integrate SpotEffects with other tools. The A/B testing feature can be a little clunky and difficult to use. It also doesn't support all the ad formats that other platforms do. SpotEffects provides a way to measure the impact of an ad without the need for a live audience. It has been a great way to measure the impact of TV ads, as well as the impact of other types of media.