In this article we will recommand you to use Automation in a certain way.
Campaings all start in the same way : from a segment or a form. Then you need to choose between an action, condition or decision.
We recommand that you do not continue the campaign directly on a decision. The decision will be taken into account only for contacts that will enter the starting segment after publishing the campaign. That means it won't work for contacts that were already in the segment at the time of the publication.