A vector, in contrast, is made up of mathematical geometric primitives like lines, circles or curves. These individual vector elements can then also be assigned a colour value. The biggest advantage that vector has over pixels is, a vector can be scaled to ANY size without losing quality. For example, if you have an image of your lovable pet pug (which you’ve taken with your smartphone) and you’d like to print it out into an A0 sized poster (so you can hang it up on your living room wall), you would need to increase the size of the image from 150 x 200mm to 1104 x 841mm. In other words, you would need to increase the image size by 600%. That will result in what the pro’s call “a pixilated print”.