When you select this option, you purchase the creation of your first Blu-Ray (the manu creation, the mastering, etc…). Any subsequent disk order will be at a the lower additional disk rate, available on the cart screen or here: https://www.livemauiwebcasts.com/product/extra-disk/
When you select this option, your DVD is upgraded to Blu-Ray. That means you are taking advantage of the full high definition resolution. This makes for a STUNNING image that is a massive step up from standard definition (what DVD's are relegated to).
A blu-ray player is required for this disk to be playable.