What could cause an offer not to appear in the Email Designer despite being set up?

The correct answer highlights that the collection is static and does not include the new offer. In Adobe Journey Optimizer, collections are used to group offers, and if a collection is defined as static, it means that it does not dynamically update to include new offers after its initial creation. Therefore, if a new offer has been added after the collection was created, it will not automatically appear in that static collection. This static nature prevents new content from being included unless the collection itself is updated or recreated.

Understanding this concept is crucial for effectively managing offers within the Email Designer. It emphasizes the importance of knowing whether a collection is static or dynamic and how that affects the visibility of newly created offers. To ensure that an offer appears in the Email Designer, you may need to either adjust the collection settings to make it dynamic or manually include the new offer in an updated static collection.