These are mirrors that have reflective surfaces that are curved instead of flat. This causes different images to be produced.
Concave mirrors, also known as converging mirrors have reflecting surfaces that curve inwards. This shape allows the mirror to focus light and magnify the image. This type of mirror is commonly used in microscopes, or handheld mirrors for make-up application, or shaving.
Convex mirrors, also known as diverging mirrors have reflecting surfaces that curve outward, similar to a sphere. This shape reflects the light outward and allows there to be a wider field of view, even around corners! This type of mirror is used in cars, buildings, and other areas for safety measures.