to be all around the image like a traditional frame. the composition of the image may call for a frame on only one side. give it a try.
in this concept the photographer places the subject in front of an object that will bring focus on the subject. portrait photographers will use this concept in the form of a backdrop to bring the focus on the subject.
i am not encouraging moving or sitting a natural object onto something (i believe in looking for nature where it sits) but look for something that catches your eye. an example could be a mushroom growing from a log where you can take the photo 