Fats are not all created equal. Although saturated and unsaturated fats can both be found in many foods, unsaturated fats are good for your heart while saturated fats may actually be detrimental to your heart.
The easiest way to visually tell the difference between saturated and unsaturated fats is by looking at them in their natural form. The saturated fats will be solid at room temperatures and the unsaturated fats will be liquid. There is one caveat to this though; some unsaturated fats such as coconut oil may become a solid if the room is at a cooler temperature than normal.
The reason this happens is because of their different chemical structures. Saturated fats are called saturated fats because their molecules are not double bonded so they are saturated with hydrogen molecules. Switching to the unsaturated fats, they are double bonded molecules so the hydrogen molecules have air gaps which allow for more fluidity.