Images

when you save an image form the Internet to your computer or mobile device you will have one or two different file options to save it as, for example 'J.PEG' or 'GIF'.

In fact there are many different ways you can save an image, the min difference between all the options is the file size. Often 'J.PEG's are very small, in comparison to a 'bitmap'  which are very large.

From a standard view most of the different types of files look very similar if not the same, its when you zoom in that the differences occur.

here are two images. both of these images are of the same thing, exept one is a jpeg and othe other a bitmap, they look idenditcle when put next to eachjother at this level
but if you were too zoom in you would clearly see the difference.

the image file jpeg you be more pixalated as its a smaller image then the bitmap.