How are you currently doing shipping?

You have choices, depending on what shipping methods you are using ...

Marking Products as, Always Free Shipping:
Always Free Shipping: Yes, Always Free Shipping
will make the Product have Free Shipping for everyone ...

NOTE: be sure to install the Free Shipping freeshipper shipping module ...

0 Weight, will give Free Shipping if you are using Weight oriented shipping, when you have 0 Weight means Free Shipping setup in the Configuration ... Shipping/Packaging ...
Order Free Shipping 0 Weight Status
If there is no weight to the order, does the order have Free Shipping?
0= no
1= yes

Note: When using Free Shipping, Enable the Free Shipping Module this will only show when shipping is free.