Hi again Jacqueline! Here is the reason why using Digital in your tags and titles help - It is because that is what you are selling and because these are popular Etsy keywords that customers search for. Many customers are searching for digital downloads/instant downloads.
Here is a link to all the listings that sellers used for the keywords - DIGITAL MEMORIAL -
https://www.etsy.com/search?q=digital%20memorialHere is a link to all the listings that seller used for the keywords PRINTABLE MEMORIAL -
https://www.etsy.com/search?q=PRINTABLE%20MEMORIALOther popular keywords are Miscarriage Memorial, Miscarriage Gift, Miscarriage Remembrance, Miscarriage Keepsake
The more relevant search terms that you have for your items the more chance of being found you have. If you do not use relevant keywords than you miss out on sales and being found. Hope this helps you to understand that putting both Digital and Printable in your tags and titles is crucial.