What does a macro lense do? For the iphone?

I ordered a set of lenses for my iPod 5 but I don't know what the macro one does

Wide-angled is good for wide views/ panoramic shots. Macro is a zoom lens.

I looked it up on Amazon.com:

http://www.amazon.com/...00AFXUUV6/

I'm a very passionate macro-photographer. Macro is used for EXTREMELY close-up pics. Macro used for pictures like insects, flowers(very close-up). A standard zoom lens is more is for close-ups of larger things, like zooming in on faces and such.

Think of the term Macro as Micro. We're talking about getting clear pictures of dew drops on a petal of a rose. Depending on the strength of the Macro lens will determine how close you will have to actually be to your subject. This may vary from a few feet down to a few inches. When taking these types of pics you will find it to be a completely new world. Nothing like portrait shots or landscape shots. Your wide-angle or zoom lens just can't do this. Try out that macro on something like the center of a flower. You just might find a new, fun and interesting realm that you may never want to leave.
Check out this link and you will see what I mean. You will be able to tell the difference, without a doubt, which is Macro and any other type of pics. Check it out.

The typical camera lens is optimized to image object at infinity (as far as the eye can see). Thus the typical camera lens is compromised when called upon to take pictures of objects close to the camera. Worst off all, when photographing objects at a distance of 1 meter (3 feet) or less the f/numbers engraved of the lens barrel begin to become invalid. When the object distance becomes 2x the focal length (life size), the error is 2 f/stops thus the light at the film/chip plane is 4 times dimmer then when working at infinity.

The macro lens is optimized for close-up's at life-size called "unity" or 1:1. Further, the micro lens design avoids the f/number error induced when working at close object distances. The macro lens is slightly compromised when taking pictures of distance objects.

On a real camera, it is used to take life size pictures of objects.

On an iPhone, it is a way to take your money.