What's the difference between a macro lens and other kind of lenses?

Yes Macro lens are designed to allow you to get close focus to a subject, also image ratio tends to be higher 1:2 or even better 1:1 (actual size) however a lens that says 70-300 with macro is likely just marketing a href="http://www.whatdigitalcamera.com/equipment/advice/492817/complete-guide-to-choosing-lenses-macro-lenses.html" rel="nofollow"http://www.whatdigitalcamera.com/equipme…/a