iMessages in iCloud is a feature of the Messages app which lets you sync all iMessages through iCloud to other devices using the same Apple ID, offering some other nice benefits in that process. You may have thought that was already how iMessage worked on the iPhone, iPad, and Mac, but it turns out that’s not exactly the case. Instead, Messages in iCloud is a new feature that is available from iOS 11.4 onward.
This article will explain what Messages in iCloud is, as well as show you how to enable the feature on your iPhone or iPad.