3. Vector or Bitmap

Because of the way vector files work, not all images are suitable for the format. Vector files are a list of instructions. The more detailed the image you want to create, the more instructions the file needs. At some point, it becomes more efficient to simply tell the computer what value to put at every pixel, rather than give it instructions to work it out.

For example, a detailed photograph like the one below would need so many vector instructions to recreate it, that it is more efficient to store it as a bitmap.

On the other hand geometric shapes such as the letters of a font, drawn images and logos are ideal for storing as vector images. For example, the logo below has a vector version that can be scaled to any required size.