Those are commonly called grill pans.
With a grill pan you can get an appreciable experience of outdoor grilling indoors, and staying indoors has gotten more and more necessary nowadays due to the pandemic...
The ridges allow juices to flow off the meat so the meat doesn't just sit and boil in them (like what a grill does).
That is a "grill pan" and it is intended to allow food to cook above the grease that it might release, and create grill marks on the food in which it is cooked. It simulates grilling without the benefit of the juices falling into the fire (which creates the grilled flavors that many of us enjoy).