Purpose of Picture IsNew Flag?

Hi,

Does anybody know what the Picture IsNew flag is used for? Since I do often create pictures programmatically I am not sure how to set it.

Kind regards, Stephan

This is old
https://www.nopcommerce.com/boards/t/21547/best-way-to-insert-images-programmatically-in-nop-2728.aspx#87930

But I see the same code in 4.20

Thanks!