When do segments update?
Dynamic segments update automatically and immediately. Once you create a segment, it will pull customers that meet the definitions you have established – this is why it’s important to confine a segment to a specific list if you are using it for a campaign email. Otherwise, you risk emailing people who have not opted in to receive marketing emails from you.
While segments are usually updated automatically, there are two notable exceptions.
Segments that rely on relative time conditions, which are only true after a certain period of time (i.e. purchased from an email at least 5 days ago) these types of segments update every 24 hours instead of real-time.
Segments that rely on all “negative” conditions (i.e. everyone that is not in several specified lists) – these types of segments may update with a slight delay.