这种刀刃旁有空隙的刀是用来切什么的？

https://www.zwilling.com/us/zwilling-twin-signature-7-inch-hollow-edge-santoku-30749-182/30749-182-0.html?cgid=black-friday-deals#lfrm=Mjg2ODU3NQ&cjevent=61edc26170e411ed830b01c60a82b836&utm_source=CJ&utm_medium=affiliate&utm_campaign=all_LTK_none_pst_cnv_orders_alwayson_en_us&utm_term=https%3A%2F%2Fwww.zwilling.com%2Fus%2Fblack-friday-deals%2F%3Flfrm%3DMjg2ODU3NQ&cjdata=MXxOfDB8WXww&start=6

This is to prevent the thing you are cutting sticking to the knife I believe.