A vector graphic is not made up of pixels like a bitmap, but is made up of a set of instructions to the computer of how to draw the image from scratch.
For example the vector image might contain the command
"Draw a line from position A to position B on the computer screen".
When this 'vector image' is loaded into a program that understands how to deal with it, a line gets drawn from A to B.
The nice thing about vector images is that they can be scaled without losing any quality unlike a bitmap which pixellates.
Challenge see if you can find out one extra fact on this topic that we haven't already told you
Click on this link: Vector Graphic