Ed Avis , Nov 18, 2013; 07:37 a.m.
The main characteristic of a lens is its focal length. Roughly speaking this determines the angle of view, with a shorter focal length meaning a wider angle. (You can check Wikipedia or other sites for the exact definition.) A 'zoom lens' is one where you can change the focal length, so changing the view and letting you 'zoom in' or 'zoom out'. Technically, it also means The lens you mentioned is of this type.
Focal length in the early days was also the physical length of the lens. So if you wanted to have a narrow angle of view, for photographing far-away objects, you needed a big long lens. This is still true to some extent but ways have been found to make the lens not quite as long, so a 200mm lens for example might be shorter than 200mm physically. This is called a 'telephoto' lens. More loosely, the term is used for any lens with a long focal length, typically used for head and shoulders portraits, animal photography and so on. That might mean a focal length of 85mm or more.
'Macro' photography is taking pictures of things where the final photograph shows it bigger than life size. For example a picture of a tiny spider in a poster sized print. Some take a stricter definition, insisting that the image formed on the camera's sensor should be life size or bigger. A 'macro lens' is one that lets you take these high magnification photographs, usually by moving the camera very close to the subject. An ordinary lens might not be able to focus on things that close, just as if you're over 25 you probably can't focus on a finger held just in front of your nose.
Your planned purchase sounds fine and I suggest experimenting with that before buying any extra lenses.