Garima - here's the following I got from Adobe Support. It's screen shots that may help you when defining the collection.To list out values of the field elements within the collection section of you corresponding rtevent, such as the product names, you’ll want to configure it differently. See the production listing section of following documentation for more information: https://docs.adobe.com/content/help/en/campaign-standard/using/communication-channels/transactional-messaging/event-transactio...

Hi @GarimaGakhar1, There is no such folder exists on ACS to store images. Depends on your license agreement you will be able to store the images onto Assets core service and use them on ACS.You can find more information about this on adobe documentation: Managing Images Thanks, Sathees