Exam Certified Marketing Cloud Email Specialist topic 1 question 196 discussion

To ensure the most up-to-date content is included in each email, Northern Trail Outfitters (NTO) should use: • C. Reference Content Block Reference Content Blocks allow you to create content once and reuse it across multiple emails. When the content is updated in the Reference Content Block, all emails that include this block will automatically reflect the latest content. This is particularly useful for content that changes frequently, such as special events and seasonal promotions.

https://help.salesforce.com/s/articleView?id=sf.mc_ceb_create_dynamic_content.htm&type=5

Einstein content selection uses to find the winner content. But reference content block is used as pointer to see the most updated email or template.