What action must be taken to keep all changes made to a page after editing in AEM?

To ensure that all changes made to a page after editing in Adobe Experience Manager (AEM) are preserved, the action that must be taken is to save those changes. Saving is critical because it commits the modifications made during the editing session to the system, ensuring that they are not lost.

When you edit content in AEM, those changes reside only in your current editing session until you explicitly save them. If you move away from the page without saving, all alterations will revert to their previous state, meaning that any developments or updates you made would be lost.

While publishing is an important step in the workflow to make changes visible to end-users, it occurs after saving. Saving is the first necessary step because it captures and stores the work done before any further actions, such as publishing or versioning, can occur.

The options of deleting or rolling back are not appropriate for retaining edits. Deleting would remove content from the page, while rolling back would undo changes instead of keeping them. Consequently, saving is the essential action required to maintain the integrity of the changes made.