noun
free shipping
Commonly seen on e-commerce sites and in advertisements. Refers to the absence of delivery charges.
この商品は送料無料です。
This item comes with free shipping.
送料無料キャンペーンは今週末までです。
The free shipping campaign runs until this weekend.
送料込み means 'shipping included' (in the price), while 送料無料 explicitly means the shipping charge is waived.
Compound of 送料 (shipping fee) and 無料 (free of charge).