245(i)?/

can somebody explain this i dont understand what an attorney want to say by this: "if you have a 245(i) petition pending you can extend the removal in some cases because of it" what he want to say about the extend the removal ? and how an extend can help in case of a removal ?

can somebody explain this i dont understand what an attorney want to say by this: "if you have a 245(i) petition pending you can extend the removal in some cases because of it" what he want to say about the extend the removal ? and how an extend can help in case of a removal ?