Your lens is a zoom lens, its goes from 18mm, which is wide angle, to 105mm, which is telephoto, or zoomed in.
Most macro lenses have a fixed focal length, meaning they dont zoom.
The only other differences between a macro lens and any other, is the distance they can focus.
Most normal lenses will only focus on something maybe a foot in front of the lens. A macro lens will be bale to focus on something much closer, which make its appear bigger in the frame.
You can tell if a lens does 1:1, as it will say it on the extreme of the focus window. No "non macro" lens will focus that close. Only dedicated macro lenses will.
Some lenses, cush as some 70-300 lenses may say macro on them, but they arent "true macro". They will focus to maybe 1:3 or 1:2.
thank you for that our posts crossed ,
1:1 means the subject is life size, if it was placed directly on the sensor.
say you take a photo o a 10 pence coin. If you printed that photo the same size as the sensor, and placed it next to the 10 pence coin, both the actual coin and the photographed coin would be the same size.
If you did the same with a 1:2 magnifaction, the printed coin would be half the size of the actual coin.