Graphics refer to the things that appear on your television, computer monitor, or handheld screen.
As the term "video game" implies, visual information is very important to the media.
Until the mid-1990s, most game graphics were two-dimensional. More powerful machines and graphic software made the possibility of three-dimensional graphics practical, although some games continue to use 2D for nostalgic purposes. Some games are a hybrid of the two techniques (called two-and-a-half-dimensional).