Define video resolution?

Pixel art was very often used in older computer and video console games. With the increasing use of 3D graphics in games, pixel art lost some of its use. Despite that, this is still a very active professional/amateur area, since mobile phones and other portable devices still have low resolution and then require a skillful use of space and memory. Sometimes pixel art is used for advertising too. One such company that uses pixel art to advertise is Bell. The group eboy specializes in pixel graphics for advertising and has been featured in magazines such as WIRED, Popular Science, and Fortune 500.