What is the chain on a bbq grill for?

You're likely referring to the rotisserie chain on a BBQ grill. This chain is used to:

* Securely hold and rotate food: The chain attaches to the rotisserie rod, which then goes through the food being cooked. This allows the food to rotate evenly, ensuring all sides are cooked thoroughly.

* Allow for even cooking: The constant rotation of the food ensures that heat is distributed evenly, leading to more consistent cooking results.

* Create crispy skin or exterior: The rotating motion helps to create a crispy and flavorful skin on chicken, pork, or other meats.

Essentially, the rotisserie chain makes it possible to cook food on a rotisserie, which is a popular method for achieving juicy and flavorful results.