Fill the Frame!
In this article you will get either the full concept of what filling the fame is or just an idea of what it is depending on how you interpret this article.
Filling the fame is taking a simple photo and putting it into a square frame. no not like a filter frame, like editing it into an actual square. You take the photograph and you move in closer to the object you're taking a picture of. That is basically it, well the dumbed down version. Below are some examples