Use the Reference Content block to add a pointer to an existing content that you can update with the latest content. This will ensure that the block always has the latest content.
In Salesforce Marketing Cloud Content Builder, how do I use the Reference Content block?
Hover over the layout and click to edit. Drag and drop the Reference Content block into the area where you want the block to display.
When the block opens for editing, it will take you to the local folders. Find and click on the content you want and click Select.
After selecting the content item, it will preview. You have the option to Replace or Delete the reference content.
When finished, click Done Editing.