About the difference between wide-angle and telephoto
If you are wondering why your face or body looks so distorted in a close-up picture, there is an easy solution for that one, just zoom in slightly to get away from the wide-angle your camera (except a DSLR) usually starts with when being turned on.
While wide-angle (small mm) is helpful when you want to photograph a room or a landscape, it makes more sense to step back a bit and use the optical zoom if the space is there.

