1. The CSS box model is a box that is wrapped around each element. It consists of 4 different parts. The content, padding, border, and margin.
2. The margin is space around the element while padding is the space between the element and the content inside of it.
3. The total height and width of an element is determined by the "content-box" property, which only accounts for the content itself.
4. This property creates 25 pixels of padding on the top and bottom and 50px of padding on the left and right.