Can someone tell me what the difference is?
Fragments: A fragment is a reusable component that can be referenced in one or more emails.
Content Blocks: Content blocks are dynamic, personalized and have a specific rendering. For example, you can add a greeting or a link to the mirror page.
Don't they sound the same? under what use cases you would use them?
Hi,
Fragments are more static (think a single image) that does not take personalization or other conditions into account.
Content blocks, as mentioned, are personalized and dynamic, and an example would be configuring a content block to take into account the first and last name of the recipient and tailor the response accordingly.
https://experienceleague.adobe.com/docs/campaign-standard/using/designing-content/personalization.html?lang=en
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